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High Speed Travelator

Anonymous Award writes "Remember those old Isaac Asimov tales of cities of the future, where everybody walked along on moving sidewalks, sometimes clear across a country? Today's airport travelators have always been disappointingly pale imitations of these, but now in Paris we may be seeing the true birth of this wonderfully dangerous mode of mass transportation. Its already as fast as a bus, but when they can crank them up to motorway speeds... well, lets just say this may have a better chance of having cities designed around it than certain other recent innovations."

89 of 333 comments (clear)

  1. You know... by Anonymous Coward · · Score: 4, Interesting

    When it gets up to a certain speed, the wind resistance against your body will be greater than the friction of the belt against your feet, and you will cease to move forward...

    1. Re:You know... by archeopterix · · Score: 5, Informative
      When it gets up to a certain speed, the wind resistance against your body will be greater than the friction of the belt against your feet, and you will cease to move forward...
      Now this should look funny. But if you enclose the belt in a tube, with air moving with the speed of the belt (either artificially propelled or just "pulled" by the belt), the wind resistance becomes less of a problem.
    2. Re:You know... by x0n · · Score: 2, Funny

      unless it is contained in a tunnel with the wind being blown behind you at the same speed. Oops, the conveyor belt stops, blown onto your face, sue! Oops, wind stops, blown backwards, smash the face of the person behind you, sue! You will have people literally running into the back of you.

      --

      PGP KeyId: 0x08D63965
    3. Re:You know... by io333 · · Score: 5, Funny

      Not if it travels in a tunnel and they evacuate all the air.

      I loved that old story. I hope this really happens!

    4. Re:You know... by Anonymous Coward · · Score: 5, Funny

      "But if you enclose the belt in a tube, with air moving with the speed of the belt (either artificially propelled or just "pulled" by the belt), the wind resistance becomes less of a problem."

      Until you fart! "Damn, this smell has been with me all the way from Pittsburgh!".

    5. Re:You know... by visgoth · · Score: 3, Insightful

      IANAP (I am not a physicist) but the velocities needed to create that much atmospheric friction would appear to be pretty damn high.

      --
      My patience is infinite, my time is not.
    6. Re:You know... by BorgDrone · · Score: 4, Insightful

      you will not cease to move forward.

      Once the wind resistance equals the force from the belt against your feet, you will cease to accellerate, it's not like you're suddenly going to stop.

      Note that the belt has to move pretty fast for that to happen.

    7. Re:You know... by klaasvakie · · Score: 5, Interesting

      When it gets up to a certain speed, the wind resistance against your body will be greater than the friction of the belt against your feet, and you will cease to move forward...

      IANAP either, BUT I just walked to our wind tunnel at university, and stood in it. It takes no effort to stay upright up to 50km/h. At 80km/h one has to concentrate on staying upright, didn't go faster than that.

      --
      # ssh -l neo the_matrix; killall -9 agent_smith
    8. Re:You know... by FoxMcCloud · · Score: 2, Insightful

      Well actually the friction only acts on your feet, while the wind resistance acts on your whole body (the front of it anyway), so you'll very likely fall backwards rather than just stop moving forward...

      --
      bool Marketoid::IsGood(){return IsDead();}
    9. Re:You know... by PhysicsExpert · · Score: 3, Interesting

      I think you'd actually lose your balance as the friction force would act on your feet whereas the drag force would act on your whole body. Anyway at what speed would the two forces be equal?

      drag = 0.5*C*A*D*V^2
      where:
      C is the drag coefficient
      A is the cross section area
      D is the density of air
      V is the velocity


      The frictional force will equal FMg
      Where:
      F is the coefficient of friction between the walkway and the shoes of the person
      M is the mass of the person
      g is acceleration due to gravity


      Anyway using C = 1, A = 1.4m^2, D = 1.3KgM-3, F = 1, M = 70kg the forces will balance at about 23ms-1 or 51mph

      --
      All that glitters has a high refractive index.
    10. Re:You know... by Anonymous Coward · · Score: 2, Informative

      "Once the wind resistance equals the force from the belt against your feet, you will cease to accellerate, it's not like you're suddenly going to stop."

      This isn't a case of two opposing forces acting at the center of gravity of a rigid body. You've got the friction force of the belt acting tangentially at the very bottom, and the drag force acting in the opposite direction all over the body. What would actually happen when the drag force got too strong is that the high torque would cause some people on the belt to loose their balance and fall backwards. This would happen long before the static friction of the belt was overcome. But before this happened, there would be other problems, like getting bugs lodged in your eyeball. Plus, if you farted, like 50 people behind you would smell it before it cleared out.

    11. Re:You know... by Funkitup · · Score: 4, Interesting

      All the people on the belt should pull enough air along with them so air pumps wont be that necessary.

      A basic invention is not dissimilar to a train - you get into a box that has rollers/wheels on the bottom. Internal friction in the wheels/rollers will accelerate the box on the conveyor belt and the box can then be accelerated to whatever speed wanted (extremely fast if in a vacuum). The same effect will slow the box down when it comes off the other end.

      Boxes can then be sent back using a travellator that goes the other way, or another idea is to make them collapsible so they can go back under the conveyorbelt.

    12. Re:You know... by yummysoup · · Score: 2, Informative

      Yeah, terminal velocity's about 190km/h when you're on your belly (your body is in an arch with your belly forward and your arms and legs slightly back to maintain control, kind of like a badminton birdie).

      If you go head-down, you become more aerodynamic and fall at 290km/h.

      But with this device, because the force only acts on your hands and feet (which are on the conveyor and holding the handrails) rather than on your whole body (as does gravity in skydiving), I doubt you'll reach anywhere near those speeds.

    13. Re:You know... by Jellybob · · Score: 2, Funny
      At 80km/h one has to concentrate on staying upright, didn't go faster than that.


      Chicken.
    14. Re:You know... by Derling+Whirvish · · Score: 2, Funny
      When it gets up to a certain speed, the wind resistance against your body will be greater than the friction of the belt against your feet, and you will cease to move forward...


      You can test your theory by standing up in the back of a pickup truck at various speeds. Since the friction of the belt would be identical to the friction of the bed of the pickup truck it's a good analogy. Anyone have a pickup truck, some open road and a couple of nutty friends to perform the experiment?

  2. The Roads must Roll by TerryAtWork · · Score: 3, Insightful

    by Heinlein was one of the first ScFi stories I ever read!

    Glad to see it coming to fruition!

    --
    It's Christmas everyday with BitTorrent.
    1. Re:The Roads must Roll by GeorgeTheNorge · · Score: 4, Interesting

      Thanks for reminding me of the title.

      What I remember of the story was that they had this rolling road that spanned the USA from east to west, with lanes that went faster and faster. You got on the first slow speed lane, and just walked over to successively faster lanes. The fastest lane was some cool 1950's velocity like 150-300mph.

      Some disgruntled workers clipped a lane or two, with expected results.

      Nice to see Robert Heinlein's idea making it to reality, now if I could only speak Basic with someone on the moon, or have a farm on Ganymede!

      --
      If you got a $100 bill, put your hands up...
    2. Re:The Roads must Roll by WindBourne · · Score: 3, Insightful

      of course, in the story the attack takes place by having the men travel via a self balancing unicycle - segway is well on its way to that view. I suspect that we will see cities using both ideas in the future.

      --
      I prefer the "u" in honour as it seems to be missing these days.
    3. Re:The Roads must Roll by amanpatelhotmail.com · · Score: 2, Interesting
      by Heinlein was one of the first ScFi stories I ever read!

      Glad to see it coming to fruition!

      Ditto, Although I have not read the book -- this is certainly a major acheivement in the field of trasportation.

      Cars should be a thing of past. Think about this: If everyone moved at the same exact speed there would be no accidents. Certainly this travelator uses this principle, but falls a little behind (and thus has to be restricted to certain speeds).

      Instead of walking/standing, imagine your personalized bubble (read: no need to keep your feet on ground), being accelerated in to a fast moving pathway (ofcourse motion being calculated in such a way that there will be no collision when entering the fast pathway).

      This is what I would like to see come into life.

    4. Re:The Roads must Roll by GusCubed · · Score: 2, Interesting

      While I'm at it, one thing that puzzled me about 'The Roads Must Roll' is that the fastest strip (going at 100 mph I think) had restaurants etc. on it.

      When I first read the story I assumed they were on massive long looped conveyer belts, which would have made things interesting at the end of the belt when the strip, and all it's attached restaurants etc. would suddenly be hurled round the final drum and spend the return journey upside down, that is if they hadn't been thrown off by the sudden change in momentum (delta V of 200 mph?).

      reading it again, heinlein seems to say that the 'Roads' complete a circular circuit - now how in heck would that work?

      --
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    5. Re:The Roads must Roll by eyeye · · Score: 2


      reading it again, heinlein seems to say that the 'Roads' complete a circular circuit - now how in heck would that work?

      Interesting...
      I suppose they would be like luggage conveyor belts.
      You'd need a semi-flexable mounting for the restaurants though and they wouldnt be nice to eat in unless the strip had very gradual turns (I suppose it could if its that large).
      --
      Bush and Blair ate my sig!
    6. Re:The Roads must Roll by WindBourne · · Score: 3, Interesting

      2 layers. Top layer runs in a circle. The bottom layer looks like our conveyor with hooks to catch the top layer and pull it. It would have to have the capaibility of being pulled back to allow the upper belt to slide incase the conveyor stops.

      How is that idea?

      --
      I prefer the "u" in honour as it seems to be missing these days.
  3. The Roads Must Roll by Titusdot+Groan · · Score: 4, Informative

    See also The Roads Must Roll; Robert Heinlein's book based upon moving roads and what happens when the guys who maintain them go on strike ...

  4. Escalators were scary enough as a kid. by mikeophile · · Score: 4, Funny

    Imagine getting a pants leg caught in one of these people gobblers.

    1. Re:Escalators were scary enough as a kid. by Conspir8or · · Score: 4, Funny

      "Jaaaaane! Stop this crazy thing!!"

    2. Re:Escalators were scary enough as a kid. by mdielmann · · Score: 4, Funny

      Long dresses are going to make a comeback in european pr0n. I keep getting a vision of Benny Hill doing a skit where the real action starts when the lady hits the deceleration point.

      --
      Sure I'm paranoid, but am I paranoid enough?
  5. Transition by The+Only+Druid · · Score: 4, Interesting

    As mentioned in the article, the most difficult issue is the transition from moving on the walkway and moving on stationary ground.

    It seems to me the best solution to this is to have "lanes" in the walkway. The far left lane would move at the maximum speed, whereas successive lanes to the right would be decelerated. When exits were reached, you could easily step to the right to get to a lower speed; the transition between 9km/h and 6km/h is still a transition, but its less than 9km/h to 0km/h.

    --
    "Stumble before you crawl"
    1. Re:Transition by x0n · · Score: 5, Funny

      Yep, it's all very clinical and precise until you bring alcohol into the equasion.

      --

      PGP KeyId: 0x08D63965
    2. Re:Transition by KingJoshi · · Score: 2, Interesting

      Sounds like a nice idea, but people hold on to handrails. You need to have some type of handrails overhead that's short enough for everyone but not too short to be inconvenient for tall people.

      --
      In times like these, it is helpful to remember that there have always been times like these. - Paul Harvey
    3. Re:Transition by The+Only+Druid · · Score: 4, Insightful

      I dont know; in my personal experience with these devices (in their slower, American and Australian forms), I've rarely seen people hold the railing. Most often, they're holding their bags, walking, or reading, etc.

      Obviously, I'm not suggesting no one uses the railing. But the people who need the railing (i.e. the elderly, the poorly balanced) might not be well advised to use such a device as this.

      Alternately: put hanging handles a la the subway system. They'd be adjustable (i.e. you could raise/lower them) with one hand, and then you'd avoid the need for a railing.

      --
      "Stumble before you crawl"
    4. Re:Transition by Qzukk · · Score: 3, Insightful

      The problem would be where would the poles *go* when you reached the end of the strip. If they just went around like on a conveyor belt, someone would get themselves pinned between the pole and the floor either out of malice (if it didn't slice through the person, the belt would jam or break) or sheer stupidity.

      If the belt ran around a deeper area, I could see an "internal" belt, carefully timed and placed so that the poles sank down at the end of the track, where the internal belt just held the poles and the external one had holes for the poles to stick through.

      So many holes and poles... Freud would be shocked.

      --
      If I have been able to see further than others, it is because I bought a pair of binoculars.
    5. Re:Transition by tfischer · · Score: 4, Informative

      >>It seems to me the best solution to this is to have "lanes" in the walkway.

      In fact, this is exactly what they have in Paris. The high-speed travelator was put in between two other standard moving walkways. One of the standard walkways goes in the opposite direction, and the other lets you move along at 3km/h. So pedestrians do have a choice between the 9km/h lane, the 3km/h lane, or the "old fashioned" 0km/h walkway.

      The only thing I don't like about the highspeed walkway is the fact that it is only running during the workday, Mon-Fri. There were enough people who were falling on it that they had to employ people to stand at both ends of the thing to make sure that users don't hurt themselves...

      tom

    6. Re:Transition by xA40D · · Score: 2, Funny

      The far left lane would move at the maximum speed, whereas successive lanes to the right would be decelerated.

      No, a better way would the to have the lanes getting faster as you move right. Just as driving on the left is superior, more logical, etc., etc.

      --
      Do you mind, your karma has just run over my dogma.
    7. Re:Transition by putaro · · Score: 2, Informative

      Not quite. The idea would be to have the lanes running at different speed alongside each other (without handrails in between and no gaps) and be able to SWITCH lanes to speed up. This was the system that Heinlein laid out in The Roads Must Roll. The system for accelerating used looks like a clever solution, though. I'm not sure how practical it would be to switch lanes in reality.

    8. Re:Transition by lfourrier · · Score: 3, Interesting

      Already done, already in Paris, during 1900 universal exposition: a two lanes, two speeds walkway
      http://gallica.bnf.fr/scripts/Consultatio nTout.exe ?O=03300029&E=50

    9. Re:Transition by Anonymous Coward · · Score: 5, Interesting
      An easier way to do this woul be to do what they've done recently in Japan to solve this issue. They've got sliding panels as the tread that propels you. Toward the beginning and the end, the panels slide over each other, which slows down the railway. This is because each section of the railway lets a certain number of these sliding panels through per minute, but as they panels lap over each other, the speed needed to let the same number of panels through decreases. This is probably tricky to visualize.

      In the middle of the runway, the panels look like this (different numbers to indicate the different individual panels)

      11111111111________22222222222________33333333333
      ________22222222222________33333333333________4444 4444444

      (sorry about the multiple _s...I've never had to try and find an alternative for on /. before)
      At the ends, they slide together like this:

      111111111112222222222233333333333
      222222222223333333333344444444444

      So that even though the speed slows down, the panels don't squish each other, breaking the machine. I saw it on TV, and the dude was just whipping along the corridor. If they combined this system at a higher pace with the roller system they've got in France, they could probably take the speed up a fair bit.

    10. Re:Transition by DeusExLibris · · Score: 3, Interesting

      It seems to me that a better solution would be to have rotating disks at transistion points along the route. This way people could step onto the outer edge of the disk (where the outer angular velocity equals the linear velocity of the belt). They could walk into the center (where the angular velocity is much lower) and then step off into the center hole.

      Of course, the problem with this is that the disk would need to be enormously large to make the centripetal force reasonable.

      A quick calculation shows that acceleration on the outer edge of a 1000m radius disk that has a angular velocity of 100km/hr is ~130m/s^2. Unfortunately, that is ~13g! To get that down to manageable forces, the disk would need to be at least 10K m in radius (13m/s^2 or ~1.4g).

      Since this is just a back of the envelope type of calculation anyway, pehaps someone has a better idea of reducing the forces?

    11. Re:Transition by sgups · · Score: 2, Insightful

      This is all well and good but don't most people in airports and stations have some sort of luggage as well. Those could accound for most of the accidents.

      --
      Democratic USA - Government of the corporations, by the Corporations, for the corporations.
    12. Re:Transition by DavidTC · · Score: 3, Insightful
      You need to make sure that, whatever you do, you jam both of them at once if one of them jams.

      It seems stupid that someone jamming the handles should jam the walkway, but once I was going down an escalator, casually leaning on the rail to look at some store, and some idiotic kids at the top of the escalator stuck something in the railing (whcih for some reason was partially open) and made the handhold jump track. So suddenly I was leaning on something that had stopped moving...and my feet kept going, and I quickly landed on my ass on the step above me. Luckily it was the down escalator, if it had been the up escalator, I would have 'landed on my ass on the step below me', which of course doesn't actually work and results in people rolling down the stairs.

      Trust me, it's much better for the whole thing to shudder and stop than half of it to do so, as people can easily be equally attached to the floor and any handles. Especially with loops from the ceiling...you could end up trying to pull someone's arm off!

      --
      If corporations are people, aren't stockholders guilty of slavery?
    13. Re:Transition by Syre · · Score: 2, Informative

      Your "lanes" idea is a good one.

      Also an old one.

      This exact method of transportation is found in the Isaac Asimov novel "Caves of Steel", published in 1954.

      In that book (if memory serves me correctly), the fast lanes go at highway speed and have limited access on and off points.

  6. Yeah. by Faust7 · · Score: 5, Funny

    Am I the only one who would be embarrassed to use this simply by virtue of its name?

    "How are you getting there?"
    "Oh, I'm taking the travelator."
    "...."

  7. Very Neat by squaretorus · · Score: 5, Funny

    I read this this morning on the BBC and immediately booked a weekend in Paris for myself and my beloved - hey its summer, the flights were under 200 sterling return and I cant wait to see her fall on her arse as we get on this thing!

    I'm just hoping they dont stop you taking skateboards onto this thing!

  8. Cool by spoonist · · Score: 2, Funny

    What an accomplishment!

    Did they smash a bottle of cheap Champagne over it to dedicate it?

  9. Mmm.. lawsuits.. by walmass · · Score: 5, Funny

    US personal injury lawyers are already lobbying to bring this to the USA.

  10. Read The Article by EnglishTim · · Score: 2, Informative

    This one goes about three to four times as fast as a normal one does. It has acceleration and decelleration zones at the beginning and end, as it would be far too fast to get on otherwise.

  11. The problem is for distances _under_ 1 km ?! by itsme1234 · · Score: 3, Interesting

    ----
    "The real problem nowadays is how to move crowds; they can travel fast over long distances with the TGV (high-speed train) or airplanes, but not over short distances (under 1km)," he says.
    ---

    How about good ol' walking ?!

    1. Re:The problem is for distances _under_ 1 km ?! by Frogking · · Score: 3, Funny

      How about good ol' walking ?!

      Well, have you ever been in a public space with a large group of people? As simple as the concept is, many people can't seem to understand that there is a reason people go to airports, etc... they are trying to get somewhere! However, throw in a few shutter-bugs taking pictures of everything, or social butterflies that have to stop and talk to every third person they see, and you've got one large fleshy traffic jam. If I could bypass all of the slow, stupid and otherwise unmotivated people by stepping onto a rolling sidewalk, I'm there! At least there would be a minimum speed. Of course, I'd be one of the people still trying to speed-walk while on the thing, but even when stuck behind someone I'd still be moving.

      Of course, I can see this invention starting a whole new type of road rage... perhaps I should go to France and try it out before they make laws against bumping someone out of the way "by accident."

    2. Re:The problem is for distances _under_ 1 km ?! by hplasm · · Score: 2, Funny
      How about a giant catapult? *ping!*

      thud.

      --
      ...and he grinned, like a fox eating shit out of a wire brush.
  12. Strip running by F4Codec · · Score: 4, Funny
    So when can we see the first (Asimov) strip runners.

    Say, whats the bandwidth of one of these if you can stack boxes of DVD-RW on one end and take them off the other.

    Julian.

  13. Coming Autumn 2003 by dewie · · Score: 5, Funny

    He's been sent back through time on a mission: to move between different locations!

    Arnold Schwarzenegger is... "The Travelator".

    --
    Jurisprudence Fetishist Gets Off On A Technicality --theonion.com
  14. Will it be like... by Anonymous Coward · · Score: 5, Funny
    ... in Futurama - where if they malfunction or you don't know how to get off them properly - you get spatted against the nearest wall???

    Pfft... tourist.
  15. A Segway for this sidewalk?... by jkrise · · Score: 2, Funny

    And what about moving WiFi hotspots?

    --
    If you keep throwing chairs, one day you'll break windows....
  16. Timeline by Faust7 · · Score: 4, Funny

    Today: The introduction of the travelator eliminates the need for walking.

    10 years: Our legs become strange, archaic appendages that surgeons will handily remove for a small fee.

    100 years: Our brains float around in little hovering domes.

    I want a cobalt blue dome.

    1. Re:Timeline by KingJoshi · · Score: 2, Funny

      You're a slashdotter (like me), so you may have forgotten this activity that many humans find pleasurable. It's called sex. :p

      Sure, 100 years from now, they might be able to replicate the chemical feel of sex, but damn, I doubt people would be willing. Sure, I never had sex, but damn, I hear it's great! :D

      --
      In times like these, it is helpful to remember that there have always been times like these. - Paul Harvey
  17. This travelator is a lot of fun by James+Durie · · Score: 5, Informative

    I went Paris for the weekend in March and we went through Montparnasse one day and went on this travelator.

    They have guys watching to stop certain people getting on, I have heard they have had to pay out for injuries to some people.

    First it accelerates you to 9kph then it is exactly like a normal travelator only much faster.

    I loved it.

    The only problems are the acceleration and deceleration phases. It's very bumpy. You have to hold on to the rail. If they can fix those aspects these things will start appearing in airports everywhere.

    1. Re:This travelator is a lot of fun by fruey · · Score: 2, Informative

      I have also been on this travelator

      The accel/decel zones are like a number of ballbearings or something, which are rotating at gradually increasing speeds. This is why you need to keep both feet on the ground, because otherwise you could end up falling over.

      It's a configuration a bit like this:
      xoxoxoxox
      oxoxoxoxo
      xoxoxoxox
      oxoxoxoxo

      where the o's are cylinders and xs are gaps... they gradually accelerate you and then you sort of step onto the travelator moving at 9kph and the reverse happens at the other end. I can see why people fall over. There are notices and announcements everywhere "keep both feet on the floor" and "be careful" and "hold the rail, especially during accel/decel" but the researchers forget ...

      1. Announcements are so poorly used throughout public transport infrastructures that people don't listen to them,
      2. People think they are so clever that they need not heed the announcements, like they can defy acceleration forces and gravity
      3. Old people don't think the "if you are old or have a lot of luggage, please use the regular travelator" applies to them
      4. It's really for regulars, not for tourists, because tourists have loads of baggage and always block the travelator - already they don't read the "stand on the right" signs and stick themselves in the middle of the regular travelators
      --
      Conversion Rate Optimisation French / English consultant
  18. Many points of failure? by Savant · · Score: 5, Interesting

    It would seem to me that the sheer number of moving parts in a kilometre or so of walkway must make the chances of frequent failures pretty high compared to other public transport methods. How fault-tolerant is it? Any French Slashdotters able to answer?

    Would be interesting to see some schematics.

  19. it's mechanical.. by way2trivial · · Score: 5, Interesting
    it's a poor solution..
    better would be organic, something like stomach cillia, where the floor doesn't move the length of the journey, but little tiny bits from in place do- not my idea, something I read once.

    the individual elements take turns dropping, moving a tiny bit, pushing up again, and moving you a tiny bit... done repeatedly= ya move down the floor- which doesn't move.

    less to break down, and spilled drinks and food (as long as they aren't too hot) are actually welcome...

    --
    every day http://en.wikipedia.org/wiki/Special:Random
    1. Re:it's mechanical.. by Anonymous Coward · · Score: 2, Funny
      better would be organic, something like stomach cillia, where the floor doesn't move the length of the journey, but little tiny bits from in place do- not my idea, something I read once.

      the individual elements take turns dropping, moving a tiny bit, pushing up again, and moving you a tiny bit... done repeatedly= ya move down the floor- which doesn't move.

      We have that. It's called the sea. What you just described is known, in areas where the sea is generally warm enough, as "surfing".
  20. I have been to the future... by Ceriel+Nosforit · · Score: 2, Interesting

    ...And it's located in the tunnels beneath the Geneve airport. They've got a system like this there, but I'm not sure they run it at the same speed. At least I didn't think it was moving that fast when I used it. Quite fun, atually.
    I also use a similar thing in a local supermarket. All you'd have to do is crank up the speed on it to equal the Paris one, but then again, it's slighly elevated and I don't think people like being catapulted from the 2nd floor...

    Is this a reinvention of the wheel (Kakakaka! Transportation!) or did I miss something? Prolly the latter, so please releive me of my blissful ignorance.

    --
    All rites reversed 2010
  21. People will adjust. by FTL · · Score: 4, Insightful
    I was at Toronto International airport last year and saw an Ethiopian woman and young child at the top of an escalator. They were clearly having problems. I took the hand of the child and helped her take "the big step". Presumably her first. She had no problems. Then I realised that I was helping the wrong person. The mother was now stranded at the top wondering what to do.

    Teavelators, escalators, revolving doors, they seem natural and intuitive to those who are used to them.

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  22. Expressways by ariehk · · Score: 4, Interesting

    As an idea, these expressways are a fairly good way of transporting humans. They travel at constant speed, so there should be no obvious difference to the traveller, no matter what the speed is. Of course, in reailty we'd experience air resistence; try sticking your head out of the window on a car going at 70mph. but there may be some way of reducing this in enclosed tunnels, like blowing air at the same velocity as the floor is moving.

    In Asimov's vision (I think), the different-speed strips were parallel to each other, not serial like this French version. This meant that you's step to the side to go onto a faster strip, and keep going until you hit the fastest one, which could be several hundred miles an hour. As the differential in speed between the strip you are on and those near is never more than about 1mph, you won't do yourself any serious damage by falling over. see diagram:

    ---->---7mph->--
    ---->---8mph->--
    ---->---9mph->--
    etc.

    This structure makes them easier to 'network'. The only danger, I suppose, is if a strip breaks then the speed-differential between it and then next one could be massive.

    I suppose any serious implementation would use some kind of semiconductor thang to decrease friction, and on a wide scale could be very energy efficient. These things are probably more useful to society than a Segway, but you'd have to design a city around them from the ground up, so I doubt they'll change the way we live just yet.

    --
    These people look deep within my soul and assign me a number based on the order in which I joined. -- Homer Simpson
    1. Re:Expressways by phillymjs · · Score: 4, Funny

      ---->---7mph->--
      ---->---8mph->--
      ---->---9mph->--


      That won't work. You'll just get some stupid old lady in the fast lane, walking backwards at 2mph with her blinker on.

      ~Philly

    2. Re:Expressways by jridley · · Score: 2, Informative

      In **Heinlein**'s (not Asimov's) story, yes, they had seats, but heck, they also had DINERS on the long-haul tracks.

      Obviously, no hand rails, unless they can be attached to the track itself.

  23. Not that hot by onthefenceman · · Score: 3, Insightful

    When I first read "already as fast as a bus" I envisioned this thing cranking along at 30mph, people hanging on for dear life with the wind blowing their hair back. 9 km/h is a decent jogging pace, so maybe they are referring to the average speed of a bus in Paris. I am unimpressed.

    Besides, in the first month they are going to have at least one old lady fall on the exit rollers with her gigantic suitcase and 40 other people will be force-fed into the melee to create a giant writhing heap.

    All it will take is one idiot and his lawyer to mess it up for everyone else.

    --
    Have you seen my stapler?
  24. And the earth moved beneath us by supersam · · Score: 2, Informative

    This is a neat thing. I guess they're using it or have at least tried it out at a few other places around the world.

    I had read in a newspaper report some months back that authorities in Mumbai, India were planning to install this kind of 'travelator' to link two of the most important railway stations in Mumbai, Churchgate and CST. But I don't remember seeing any action on it since then.

    Btw, I would like to advise the travelator operators in Paris to hand out barf bags to people travelling on these contraptions. *heh*

  25. Re:kinda silly by GMontag · · Score: 4, Funny

    We have few traditions on SlashDot and you are stepping on the most sacred.

  26. Meet George Jetson by n1nj4k3n · · Score: 2, Funny

    Wow! After I say goodbye to the wife Jane, my boy Elroy, daughter Jane, and pat Astro on the head, I can hop on one of these babies and start another productive day at Spacely Sprockets. Ain't the future grand?

  27. Bah! They've done it before. by Pig+Hogger · · Score: 4, Informative
    It's not really a big innovations. The French did it 103 years ago, during the 1900 exhibiton. A rolling sidewalk was running along the exhibition and was whisking visitors at about 8 km/h. It was composed of two side-by-side rolling sidewalks one going at half the speed as the other.

    If you ask me, this was a much better design than the neck-breaking jallopy installed in Montparnasse Station...

    They also experimented some 30 years ago with one that was shaped like an integral sign; instead of a rubber plate, there were solid plates which slide sideways at the end, effectively yielding a slower speed but without the jarring hells-on-wheels acceleration.

    1. Re:Bah! They've done it before. by Anonymous Coward · · Score: 3, Informative

      Yep. And I live in Paris. In the last 6 months or so, I went to Montparnasse station about 10 time, and have _never_ seen the High Speed Travelator working (always closed because they were 'fixing' it).

      There have been a lot of stories in the newspaper about it. Basically, it doesn't work. A waste of money, specially considering the lack of escalators in most of Paris metro stations...

  28. I tried it by BigJim.fr · · Score: 3, Informative

    I live in Paris and tried it a while ago. It works like a charm. The acceleration and deceleration are surprisingly smooth provided you keep your feets on the ground. Then it is exactly like a normal conveyor mat. I like it and I see no drawbacks.

  29. Thousands each year are injured by conveyers : by 2TecTom · · Score: 2, Informative

    http://rockymountainnews.com/drmn/local/article/0, 1299,DRMN_15_2087992,00.html

    As usual, some people just can't seem to get along. ;~)

    Personally, I think more could be done with this concept. If the center, fastest "strip" was a sit down type one, wouldn't this really be nothing more than a permanently available, perpetual people bus. Think about it, moving McDonalds, talk about fast food!

    As well, these conveyers could easily be constructed as subways. I can also see these being used at large exhibitions, galleries, parks and muesums.

    Other conveyers of note:

    Zizco, world's longest single flight horizontal curve conveyor
    (15.6 km)
    www.conveyor-dynamics.com/projects/popup/fs_z isco. htm

    Los Pelambres, world's largest downhill conveyor system
    (3 conveyors, 12.7 km, 1296 m drop, 8700 tph)
    www.conveyor-dynamics.com/projects/popup/fs_ lospel ambres.htm

    --
    Words to men, as air to birds.
  30. Of course not! Re:Cool by WolfWithoutAClause · · Score: 3, Funny

    They're not a bunch of cheapskates! They used the printer ink; naturally.

    --

    -WolfWithoutAClause

    "Gravity is only a theory, not a fact!"
  31. MagLev by Becquerel · · Score: 2, Interesting

    Why don't they use something like a maglevel/chairlift. On which individual carriages are propelled (at any acceleration you like :-) down a track that doesn't have the limitation of being flat and straight.

    --
    My spelling isn't bad, I'm evolving the language
  32. Heinlein, not Azimov by jridley · · Score: 2, Informative

    R. A. Heinlein, _The Roads Must Roll_
    And it was a 5 MPH difference between lanes. Every lane has to have separate motors, etc, so you don't want too many of them. 5 MPH is a brisk walk so it's not hard to move from one to the next.

  33. Wow, Travelator by sharkey · · Score: 4, Funny

    No! I thought, uh, I thought I'd chauffeur myself this evening. Yes, that's what I thought. How difficult could it be? I'm sure the manual will indicate which lever is the velocitator and which the deceleratrix, hmm?

    --

    --
    "Outlook not so good." That magic 8-ball knows everything! I'll ask about Exchange Server next.
  34. My idea by Funkitup · · Score: 2, Interesting

    A basic invention i just came up with is not dissimilar to a train - you get into a box that has rollers/wheels on the bottom. Internal friction in the wheels/rollers will accelerate the box on the conveyor belt and the box can then be accelerated to whatever speed wanted (extremely fast if in a vacuum). The same effect will slow the box down when it comes off the other end.

    Boxes can then be sent back using a travellator that goes the other way, or another idea is to make them collapsible so they can go back under the conveyor belt.

    The next question is how to design slip roads and junctions so we can build a whole network of the things.

    A sliproad is pretty easy - you just have another conveyor belt going the same speed next to the one you already have and you cross over (either in the box, or in the pedestrian version).

    Junctions could be nasty due to the concept of traffic jams. The whole thing would have to be computer controlled with each box knowing its route through the traffic so that traffic jams couldn't happen.

  35. Re:Motorway speeds? by b1t+r0t · · Score: 4, Funny
    Better yet, let's put in seats for people to sit on. And then we could put groups of seats together on a fixed platform. At that point you don't need all the surface area, so you can propel the platforms from the edges.

    Here's the really cool (and tricky) part: then you put the motors inside the platforms themselves. Then you don't need miles long rubber belts that can wear out. Just replace them with concrete floors. And to keep people from falling out, add walls. If you add a roof, you can operate them outside, even when it's raining! And for more capacity (to make up for having the seats in the first place), you can use more than one platform stacked together.

    I think it would look something like this.

    --

    --
    "Open source is good." - Steve Jobs
    "Open source is evil." - Microsoft
  36. Bahh... Everyone knows Ginger is "IT" ! by HighOrbit · · Score: 2, Interesting

    [sarcasim]
    How can this even get off the ground if future cities are designed around the Segway AKA Ginger? Ginger is the future "Human Transporter" . Ginger is "IT" !. Steve Jobs told me so! There's no place for something like this.
    [/sarcasim]

    Seriously though, I think the *real* future is in hydrogen fuel cell vehicles (whether they be private cars or public buses) for three reasons. First, that's where all the serious R&D money is going right now. Secondly, they require no great leap of concept and will be more psychologically acceptable to the public (i.e. its just a car with a different engine as opposed to something strange and possibly "dangerous"). Third, other than adding hyrdogen pumps to existing gas stations, they requie no expesive and massive public works project because they can use the current road infrastructure. The gas station problem can be handled by a government regulation on the lines of "if you run a gas station and have more than two pumps, at least one has to be for hydrogen".

    Now if they could jack up a fuel cell powerful enough for a jet engine capable of inter-city/cross-country transport, we'd be set.

  37. Ouch! by Dog+and+Pony · · Score: 2, Funny

    Where do you want to be dragged by the balls today?

    I read that as a part of the rest of the post at first, and wondered if that was how those roads worked...

  38. Solution: shoot the lawyers and their clients. by SmallFurryCreature · · Score: 3, Insightful
    Yup, fortunally this is france. Although they already been so weak as to pay damages, (do car manufacturers pay damages when you slam into a wall at the cars maximum speed?) hopefully they will be less susceptible to frivilous lawsuits.

    Just put a sign up that says you are using it at youre own risk and that the elderly, women and other idiots should just walk. Of course there should be a normal walkway to the side (if for no other reason then to allow maintenance)

    My fists start to itch when I read that stupid womans remark about her mother being scared. You don't have to fucking use it. I am tired of having the world fit itself to the lowest common denominator. This is a nice idea wich could solve some basic problems in large public areas like airports. Stupid people will always be falling over. Don't let the stupid people rule our lives.

    --

    MMO Quests are like orgasms:

    You may solo them, I prefer them in a group.

  39. Re:Quick, someone patent it by kaltkalt · · Score: 2, Funny

    Ahh but that's where you are wrong. This is a new business model of getting people to their computers/internet connection faster. That way they can buy stuff from your website (i.e. amazon.com) much more often. If you can move the people 50 times faster than they can walk, you can increase your profits by a factor of 50 (well not really but it's good enough for the patent office). And, of course, if someone walks on the Amazon.com travelator to get to a computer to order off of BarnesandNoble.com, it is a DMCA violation.

    --

    Stupid people make stupid things profitable.
  40. Moving rollers are a marginal solution by Animats · · Score: 4, Informative
    There have been many attempts to solve the speed transition problem for moving sidewalks, going back to the Paris Exposition of 1900. The usual idea is to have a speed transition between two conveyor belts, and the usual problem is to avoid someone getting caught or tripped at the transition point.

    The Loderway Accelerating Walkway, circa 1998, used multiple belts at different speeds. The transitions between belts involved a 5mm drop and small-diameter end rollers, instead of a transition plate. That was probably the simplest solution to the problem. Two systems were installed in Australia, field tests were claimed to be successful, but the manufacturer no longer seems to be around.

    NKK (yes, the zipper company) and Mitsubishi have both built prototype "accelerating moving walkways", but neither system seems to have been installed more than once. NKK's system involves expansible plate-type steps that become longer in the high-speed section. The Mitsubishi system works by turning a corner, so that a series of short wide plates transform into a series of long narrow plates. Both of these systems avoid difficult transition points, but are complicated and expensive throughout the whole length of the system. The Loderway and Paris systems have transitions, which adds risk, but the long section is just a plain belt, so the cost of long systems is manageable.

    1. Re:Moving rollers are a marginal solution by Animats · · Score: 2, Informative
      The telescopic-panel idea is reasonable, but mechanically complicated. They have to telescope slowly where they're supposed to, so there's a linkage underneath and a fair amount of mechanical complexity.

      The original moving walkway at the Paris Exposition around 1900 was really an endless train of flatcars with continouous platforms on top. Transitions between cars were handled by circular sections. There were were steps (with vertical overlaps) between the slow train and the ground, and between the fast train and the slow train. That system could turn corners, and did. Very neat, but getting on and off was a bit tricky.

  41. When the sleeper wakes by Anonymous Coward · · Score: 2, Informative

    Actually, this significantly predates Asimov and Heinlein in SciFi. It goes back to HG Wells, and When the Sleeper Wakes, which I highly recommend.

    He described not only airplanes, televisions and moving pedestrian roadways, but much of the modern way of life before it existed.

    http://www.online-literature.com/wellshg/sleeper wa kes/5/

  42. Re:Also 'Caves of Steel'? by DavidTC · · Score: 2, Interesting
    And Asimov brought up the actual problem you'd run into...not strikers sabatoging the sidewalks, but hot-shot teenagers running around leaping from one to another.

    If each strip is only 10 feet wide, and goes up 5 mph each strip...you just know you'd have kids running the 50 yard dash sideways, occasionally causing major accidents.

    --
    If corporations are people, aren't stockholders guilty of slavery?
  43. OW MY FOOT! by DCSteelShaft · · Score: 2, Interesting

    If its like the ones at american airports such as detroit, and there are walls on the side that are not moving. I guarentee that eventually your going to run across someone who's foot catches the wall and moving at that speed however fast, is going to break the guys ankle slaming him face first into the crack between the wall and the belt grinding his nose off like a belt-sander.

  44. The French take the lead, again. by lpq · · Score: 4, Insightful

    Seems like the French aren't afraid to try techno-miracles -- I haven't seen any metro system as good -- London is close, but alot of inconsistencies. In Paris and France, they aren't afraid to try new things (and the US still
    doesn't have any high-speed trains....bunch of cowards -- look big behind
    their high-tech weapons -- but when it comes to something socially useful...
    forget it. It was a shame the French became the only company to provide
    Super-Sonic speeds on jets -- and, of course, what did we do in the US?
    We banned their use in US airspace because Elmer's cow might stop producing
    milk from the occasional bang. Big woop. We could have had coast-to-coast
    in 2-3 hours, but noooOOOOOooo.... any real R&D goes to defense where
    they don't have to worry about every soldier who breaks a nail suing them.

    Americans are just so damn stupid so often....that and greedy. Grrr.

    Why can't the US every take the lead in these areas --- because it's always
    private development and unless the private developer can prove profit (minus
    real or bogus lawsuits) before it is even tested, it falls dead on the design
    floor.

    I really thought the Casino bosses in Las Vegas just might pull off the
    high speed train idea to L.A. But it's been ages since I heard that idea
    float.

    Everyone in the US seems to want to have the right to stop progress that can benefit large numbers of people -- like all the poltics with the "Rich"
    who can buy their congressmen in Menlo Park/Palo Alto and don't want BART
    to go through their town -- we were promised it would circle he Bay and have
    been paying sales tax to support it since...when, 1970's? Everything
    is politics and self-interest.

    Grrrrrr.

  45. Toronto has one by guanno · · Score: 2, Interesting

    There has been one of these at the Spadina subway station in Toronto for years. It works pretty well. They use it between two sections of perpendicular subway tunnel that are extraordinarily far apart. After living in Toronto for 8 years, I would say that the escalators and the moving sidewalk are out of order roughly 30% of the time. They're great when they work, but I have to question the cost affectiveness.