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Reverse Parking Made Easy

dsmalle writes "Dr. Rebecca Hoyle from Surrey University in England has derived a formula for reverse parking your car. A lot of insurance companies would welcome an initiative to automate parking using this formula I guess. I'm sure somebody must have tried to do this before, so why don't we see this in cars?" New York drivers know that a space that's the length of your car plus six inches is plenty of room. :)

58 comments

  1. Car length + 6 inches? by Neck_of_the_Woods · · Score: 1

    Good googleemooglee we are going to have every man this side of the Hudson trying to squeeze a H2 into a space the size of a honda....

    --
    Neck_of_the_Woods
    #/usr/local/surf/glassy/overhead
    1. Re:Car length + 6 inches? by 4of12 · · Score: 3, Funny

      Don't forget the extra senses available to urban parkers.

      Namely, instead of just limiting yourself to visual cues to determine the distance between your car and the bounding cars, you can use your internal accelerometer to sense a slight bump when you get sufficiently close to the other car.

      If you're in hurry, you can use acoustic senses, too. There will a nice "bonk" sound as your car meets the next one.

      Finally, in some cases it is possible to nudge adjoining cars over just enough to create space for your car. When you do this, though, make sure that no pedestrians are between you and the car to be nudged.

      --
      "Provided by the management for your protection."
    2. Re:Car length + 6 inches? by The_Mighty_Squid · · Score: 1

      So, you live in Hoboken too?

      --
      -- No Comment
    3. Re:Car length + 6 inches? by capnjack41 · · Score: 2, Funny
      Damn, beat me to the Hoboken joke.

      I parallel parked in a space that was literally about 8 inches bigger than my car, without a scratch to my car or anyone else's. I was so proud, I wanted to take a picture.

    4. Re:Car length + 6 inches? by mbstone · · Score: 1

      Also, make sure there are no occupants in the cars in front of and behind you, lest you cause whiplash and its resultant legal consequences....

  2. "Motorists will need a degree in maths..." by Lars+T. · · Score: 5, Funny
    From the Article: Motorists will need a degree in maths to understand Dr Hoyle's formula, which reads: p=r-w/2,g)-w+2r+b,f )-w+2r-fg max((r+w/2)+f,(r+w/2)+b)-((2r),(r+w/2+k)).

    Well, journalists need a few opening parentheses, so we can understand the formula.

    --

    Lars T.

    To the guy who modded me down from perfect to terrible Karma - Apple haters still suck

    1. Re:"Motorists will need a degree in maths..." by Lars+T. · · Score: 1

      Okay, I checked several articles on this, and this is the only that even tries to put down the formula. They all give the algorithm for parking, but forget the actual result of the formula, "the distance from the parallel car at the outset (p)".

      --

      Lars T.

      To the guy who modded me down from perfect to terrible Karma - Apple haters still suck

  3. Find a space. by Atzanteol · · Score: 3, Funny
    FIND a space that's at least one and a half times as long as your car.
    Obviously she's not from a large U.S. city. I need a formula for *this* part alone!
    --
    "Ignorance more frequently begets confidence than does knowledge"

    - Charles Darwin
  4. Good god learn how to spell by override11 · · Score: 1

    Maybe those mathmatic types dont know that is's spelled CURB not KERB, lol

    --
    No I didnt spell check this post...
    1. Re:Good god learn how to spell by Anonymous Coward · · Score: 1, Interesting

      >>Maybe those mathmatic types...

      that's mathEmatic types.

      And "curb" is the wrong spelling, or perhaps rather the wrong word. "kerb" is the original usage in England; Americans started using "curb" because the road-edging is supposed to curb the cars from going onto the pedestrian walk.

      Winston Churchill pointed out that the UK and America are "two countries separated by a common language".

    2. Re:Good god learn how to spell by legolas · · Score: 1

      Maybe those |mathematical| types don|'|t know that i|t|'s spelled CURB|,| not KERB|.|

      Local spelling differences aside, they seem to have a better grasp on basic grammar and proofreading.

      -legolas

    3. Re:Good god learn how to spell by ajs318 · · Score: 1

      kerb = the edge between the pavement and the roadway.

      curb = put a stop to.

      Using both words in sentences: "My sister often strikes the kerb when parking her car." - "Judicious use of explosives would soon curb that habit!"

      Whilst we're at it, meter = instrument for measuring something, metre = the unit of distance.

      --
      Je fume. Tu fumes. Nous fûmes!
    4. Re:Good god learn how to spell by Anonymous Coward · · Score: 0

      Boot (in USA) == something to put your foot in
      Boot (in UK) == something that an American will put in a Brit's ass if the Brit insists it has something to do with the cargo space of an automobile

  5. Paralell by Apreche · · Score: 2, Insightful

    I thought this article was going to talke about backing into a "normal" parking spot. But apparently people don't seem to know what a paralell park is. It's not a reverse park.

    Personally, I think if you can't park anywhere, at anytime, then you shouldn't be driving. United States hand out driver's licenses too easily. The driving test should be a rigorous test of skill. Only extremely skilled drivers should be allowed to get behind the wheel. A system like that would have numerous obvious positive effects. One of them would be that driving would be a lot more fun. Mainly because you have confidence in your own ability as well as the ability of others. You wouldn't have to be constantly watching out for what every other car is doing, but instead be able to have fun worrying about your own driving.

    On another slightly more unrelated note, speed limits are bs. Speed limits make the roads less safe in order to provide revenue for the states. Most people drive comfortable at about 85 mph (on the highway). If the speed limit was 85, not many people would feel comfortable driving faster than that. Presently with speed limits like 65 and 75 people feel that they are still in control of their car when they go over the limit. What results is some people who refuse to go over the limit and some people who always go 5 or 10 or even 15 mph over the limit. I think its obvious that it would be safer if every car on the road was driving at about 85mph as opposed to some driving 65 and some driving as high as 90. Mixing fast + slow cars disrupts the traffic and makes thing less-safe.

    --
    The GeekNights podcast is going strong. Listen!
    1. Re:Paralell by Zocalo · · Score: 2, Funny
      Personally, I think if you can't park anywhere, at anytime, then you shouldn't be driving.

      Yeah, I thought that too. Right up until the point I lost my license for repeated double parking alongside fire hydrants... ;)

      --
      UNIX? They're not even circumcised! Savages!
    2. Re:Paralell by sigep_ohio · · Score: 1

      While it is true that most of the danger in driving on the highway results from people driving at different speeds, there are other dangers. While you may feel in complete control of your car at 85 mph, I would argue that your senses have deluded you. Cars are governed by laws of physics in how they behave on the road. Using these laws, road engineers come up with maximum safe speeds. While thses speeds are not necesarily the actual speed limits posted, they are not exceedingly high above the posted limits. Over confidence is a huge problem that plagues many drivers. This is why teens get in accidents so often, but it also results in more experienced drivers getting in accidents. More likely it would be safer if every driver drove the current speed limit, as opposed to simply raising the speed limit.

      I also agree with your statements that too many people in the USA have a drivers license. This results in not only dangerous drivers, but too many people on the road to begin with. But, your statements about speeding make me question whether the "extremely skilled" drivers would be the safest people to have out on the road. NASCAR is on closed circuit coarses for a reason.

      --
      Beer Die is the game of champions Learning To walk my own path.
    3. Re:Paralell by calvinthorne · · Score: 1

      You neglect the problem of people who are capable of passing a rigorous driving test, and people who are always using those skills on the road.
      I'm guessing that some people who can pass a rigorous driving exam will still want to sing alond to the radio and talk on the phone and generally do things behind the wheel that take away from their driving concentration.

    4. Re:Paralell by Planesdragon · · Score: 1

      On another slightly more unrelated note, speed limits are bs. Speed limits make the roads less safe in order to provide revenue for the states. Most people drive comfortable at about 85 mph (on the highway).

      You drive a car, don't you.

      The current speed limts are more than fast enough for a bus or SUV in bad weather.

      Rather than appealing speed limits, I'd rather have the "revenue" given to the federal government, and a federally funded program started to produce uniform speed limit enforcement in each state.

      And, for those of us who like going fast, a special "can speed" license (complete with plate & logo) sounds like a better idea. Let someone take a rigorous test, apply before a judge, and get a permit to drive 5, 10, or even as much as 15 mph over the limit.

      (Solve the "what if someone else is using the car" question, with "the owner of the license pays the ticket and gets a fine.")

    5. Re:Paralell by pmz · · Score: 1

      Most people drive comfortable at about 85 mph (on the highway).

      Obviously, you haven't driven an old American four-banger with only 90HP on the highway. Often, simply driving the speed limit is hard enough in the U.S.

      I disagree that speed limits are unnecessary. One often overlooks aspect of speed is the simple formula: E = 1/2mv^2. 85MPH is potentially much much more dangerous than 65MPH when you need to stop or maneuver around a suprising obstacle (tire carcass, deer, etc.). Even those 5-star safety ratings become a joke at 85MPH.

      I think its obvious that it would be safer if every car on the road was driving at about 85mph as opposed to some driving 65 and some driving as high as 90. Mixing fast + slow cars disrupts the traffic and makes thing less-safe.

      I think you are forgetting that 40,000+ pound trucks also share that highway.

      Regardless, I do agree that driver's license standards are too low. If I had a nickel for each time a teeny-bopper cut me off without looking...

    6. Re:Paralell by amcox · · Score: 1

      At least in California, the speed limits are reset every ten years on surface streets. A survey is done on a road (ever driven over those black wires connected to a little box on the side of the road?) and the speeds of all of the drivers for a certain period of time are logged. The new limit is set at 85th percentile?85 percent of dirvers drive at or above that speed. The law allows for certain deductions to the posted limit, such as the presence of driveways or schools, but generally, the limit is how fast most people drive. Interestingly enough, if there is not a current speed survey on a road, the police may not use radar to give you a ticket. The key is finding those roads.

    7. Re:Paralell by GnarlyNome · · Score: 0

      Simple If the car is not Paid For you cain't drive it bingo we are down to three old clunkers on I-280

      --
      Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
    8. Re:Paralell by GnarlyNome · · Score: 0

      You know what they call someone driving 15mph over the speedlimit on I-280, don't you... A Hood Ornament.

      --
      Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
    9. Re:Paralell by Zaphod+B · · Score: 1

      Also, in California (oh, WHY am I telling you people this?) if the speed limit is set artificially low (for example, if neighbourhood residents complain and the limit is reduced from 35mph to 25mph), and you are ticketed for going above the posted limit but below the actual 85th percentile limit, there is precedent for having the ticket dismissed.

      For this reason, most communities either keep to the 85th percentile speed limits or put other traffic slowing devices (called "traffic calming" in Alhambra, CA) in place such as series of traffic lights that are timed for the posted limit (cf. Beverly Glen Rd. between Sunset Blvd. and Mulholland Dr. in Los Angeles, where signs inform you that the lights are timed for 30mph.)

      And any true New Yorker knows that avenue traffic lights are timed for 38 mph.

      --
      Zaphod B
      When duplication is outlawed, only outlaws will have /bin/cp
  6. Win for women? Yeah, right by seinman · · Score: 3, Funny

    If women can't even park their cars right, how the hell are they going to compute (p=r-w/2,g)-w+2r+b,f )-w+2r-fg max((r+w/2)+f,(r+w/2)+b)-((2r),(r+w/2+k)) on the fly??

  7. Parking in a tight spot by tsa · · Score: 1

    My roommate always tells me never to turn the steering wheel when the car is not moving. It's very bad for the tyres and the steering mechanism he says. Then I ask him if he ever parked a car in Utrecht or Amsterdam (two busy cities in Holland). No, he has never done that. I don't know about you but I can't park a car in a tight spot without steering while the car is not moving.

    --

    -- Cheers!

    1. Re:Parking in a tight spot by Planesdragon · · Score: 1

      Your roommate's right. It's not good to turn the steering wheel when the car isn't moving.

      But tight parking requires it, and so justifies the extra wear to your car.

    2. Re:Parking in a tight spot by tsa · · Score: 1

      Exactly. In the words of a friend of mine: then it shouldn't have become a car!

      --

      -- Cheers!

    3. Re:Parking in a tight spot by Anonymous Coward · · Score: 0

      You don't have to roll it a lot. Crank your
      wheel a bunch, let the car roll half an inch, repeat,
      etc. Just something to take the stress off. A
      little something I learned from truck driving
      school.

  8. Reverse Parking? by Anonymous Coward · · Score: 2, Funny

    Um, isn't "reverse parking" called "driving"?

    Or is this about backing into a parking space?

  9. Wierd Formula by Anonymous Coward · · Score: 0
    Motorists will need a degree in maths to understand Dr Hoyle's formula, which reads: p=r-w/2,g)-w+2r+b,f )-w+2r-fg max((r+w/2)+f,(r+w/2)+b)-((2r),(r+w/2+k)).
    Could someone please write out this formula? What's with all the commas and unopened parenthesis??
    1. Re:Wierd Formula by Idlechat · · Score: 1

      Obviously they didn't copy&paste correctly.
      They also explained what are all those variables in the right side of the equation, but forgot to explain what p means.

      --
      -0-0- idle
    2. Re:Wierd Formula by ssyladin · · Score: 1

      "the distance from the parallel car at the outset (p)" - but that still doesn't help a whole helluva lot

  10. It's Parallel, smartass by Anonymous Coward · · Score: 0

    You apparently don't know how to spell Parallel. Personally, I think you shouldn't be writing English.

    1. Re:It's Parallel, smartass by Anonymous Coward · · Score: 0

      Yeah, I don't know what paralell parking is, either. Especially when it's bold.

  11. don't even need the length of your car by AssFace · · Score: 4, Funny

    Hell, in Cambridge/Boston (and I presume any crowded city), you will see cars all the time that show the signs of not needing a space that is longer than the length of your car.
    It can even be a few inches shorter.

    There were multiple times I've come out to see someone squeezed up against my car and another car on the other side of them.

    So presumably, as long as your car has modern plastic/springy bumpers, and you don't care about it (specifically the transmission I would guess), then just cram it in to the spot and enjoy your parking spot.

    Granted this will bend your license plate, crack your bumpers, perhaps ding your fenders, and likely lose you some paint... but hey, it is worth it to park.

    Usually you see this technique on Honda Civics and other cars of that size and price range.
    The big BMW/Mercedes/etc seem to like their cars too much.
    Although you also tend to see a lot of Jeeps doing it - they are higher up, so it usually does less damage to them and more damage to others.

    Ahh, the joys of parallel parking.

    --

    There are some odd things afoot now, in the Villa Straylight.
    1. Re:don't even need the length of your car by Christopher_G_Lewis · · Score: 4, Funny

      In Chicago, we call it parking by Braille...

    2. Re:don't even need the length of your car by blaimue · · Score: 1

      Hell, in Boston you don't even need a parking space! Just park your car in the middle of the road like all the other morons...

    3. Re:don't even need the length of your car by CentrX · · Score: 1

      I know, Boston's hilariously great isn't it ;)

      --

      "The price of freedom is eternal vigilance." - Thomas Jefferson
  12. I just wish there was something I could impart... by aberson · · Score: 1
    the most annoying mistake I see when watching people parallel park is when they come in too sharp and hit the curb with their back right wheel (assuming parking on R side) and to correct they turn the steering hard right, pull forward, and then hard left to backup again. Because you steer with your FRONT wheels, and your rear wheels can turn at different rates, a hard turn like that doesn't even move your back right wheel away from the curb, so you'll make ZERO progress. Instead, people need to learn to keep the wheel straight ahead while correcting from a curb check.

    and if you really can't see behind you, some IR sensing never hurt. Worth $25 if you have a long vehicle in the city.

  13. Well known fact by r84x · · Score: 1, Funny

    I don't know how this will help, because it is a well known fact that womwn are less-abled not only in parking, but in the mathematical arts.

    --
    Karma: Can there be a void?

    .. -. - . .-. .-. --- -...

  14. When reporters report facts... by Tired_Blood · · Score: 1

    Not only the opening parentheses, but it looks like some function names were left out too.

    What does "r-w/2,g)-w+2r+b,f)" mean? If they're not argument lists, then why the commas?

    Also what does "-fg max(...)" mean? Is there supposed to be something between 'fg' and 'max'?

    Again: "-((2r),(r+w/2+k))"?

    Lots of holes in the "formula". Then again, I don't have "... a degree in maths ...".

    Just to be clear: I'm criticizing the reporter, not the researcher. If the reporter doesn't know the facts of the report - they shouldn't include stuff they aren't sure of. To be fair, at least the variables are listed within the article.

    But, given this mess, I claim to have solved the meaning of life with a simple formula. Of course, it's unreadable and unverifiable.

    --
    This is not my sig.
    1. Re:When reporters report facts... by L7_ · · Score: 1

      The reporter must have tried to copy and paste the LaTex code. ;)

  15. On higher speed limits by forged · · Score: 3, Insightful

    I'll second that. Not only you make good points, but I'll go further by saying that most speed limits were set some 30 years ago, when cars weren't nearly as safe as what they are now: think about airbags, crash-tests, engineering on the car body (basically made softer) to avoid killing the driver, etc.

  16. It's easy, with the right car by SuperBanana · · Score: 2, Interesting

    My folks' volvo has a turning radius of slightly larger than 30 feet- and it's a full size wagon. Volvos are famous for wide steering angle. It also has exceptional visibility, due to enormous windows all around.

    I can parallel-park it in about 6 seconds flat, in ONE move(no forward/backwards business), to within two inches of the curb, provided I've got 12 inches of room.

    Some people just don't "get" "how" cars "go" backwards, despite how simple it really is. Of course, I had spent most of my childhood summers driving a outboard motorboat, so I had driving backwards etc down pat(boats are far trickier, since you often have to VERY quickly apply force to stop moving in a particular direction; try parallel parking a boat); trailers are still a little tricky because they have a lot of "conditions" to their movement when going backwards. In all cases, you've got to think about how the car is going to move, and more importantly, where the non-steering end of the car is going to end up based on your actions, because that's most of the game(-especially- with trailers).

  17. smaller cars by rendermouse · · Score: 1


    The simplest solution is to buy an incredibly small car.

    --
    "Follow your Bliss." -- Joseph Campbell
  18. Paralell? by trailerparkcassanova · · Score: 5, Funny

    Personally, I think if you can't spell anywhere, at anytime, then you shouldn't be typing. United States hand out keyboards too easily. The spelling test should be a rigorous test of skill. Only extremely skilled spellers should be allowed to get behind the keyboard A system like that would have numerous obvious positive effects. One of them would be that reading would be a lot more fun. Mainly because you have confidence in your own ability as well as the ability of others. You wouldn't have to be constantly watching out for what every other word is, but instead be able to have fun worrying about your own spelling.

  19. I designed an algorithm for this by djonce · · Score: 1

    I can't take credit for coming up with a formula like that, but in one of my courses in college we designed an algorithm to park a robotic car.

    Actually, all our source and some videos are on my website... http://djonce.dyndns.org/pburgh_projects.htm

  20. Heh. Women scientists by Anonymous Coward · · Score: 0

    An insurance company survey last year revealed women were almost twice as likely as men to have a collision in a car park, 23 per cent more likely to hit a stationary car and 15 per cent more likely to reverse into another vehicle.

    Mrs Symes argues that this is because women are more likely to stay at a crash scene.

  21. Re:Parallel by zenyu · · Score: 1

    From Article FIND a space that's at least one and a half times as long as your car.

    Yeah, Right! I'm happy with six inches on each side in New York, the real problem is getting out of the spot when you have 2 inches in front and the car behind you is sitting on your bumper. The the "trick" is that in first gear you can push each car an extra couple inches, then you have enough space to get out little by little. If one of the cars is an SUV or has a car alarm you can push it 6 or 8 inches, you shouldn't drive either if your too cheap to park in a garage.

    Personally, I think if you can't park anywhere, at anytime, then you shouldn't be driving.
    What about a special "Midwestern" drivers license. If you live in North Dakota you hardly ever see another car anyway, parking is not an issue. Still it is way to easy to get a license in the US. In most 1st world countries you pay through the nose for driving classes and then take a long drive through city traffic with the DMV official. I got my license by studying while in line for the permit and then a week later, after spending an hour in a car -- so I'd know which petal was the break and which was the clutch, I took a 5 minute drive in the suburbs. I rented a car the next day, in California, with a piece of paper that said I wasn't so good with the clutch but would still be mailed a drivers license. Getting the plastic one with my picture on it turned out to take friggin six weeks, though the official drivers permit arrived even later.

  22. Hi, does anyone know the forumla for this parking? by easybody · · Score: 1

    This is the real reverse parking.

  23. Re:Parallel by anthony_dipierro · · Score: 1

    I'm happy with six inches on each side in New York, the real problem is getting out of the spot when you have 2 inches in front and the car behind you is sitting on your bumper.

    I once literally had both cars touching my car. Somehow I still managed to get out. Probably had something to do with the fact that neither car was there when I parked there, so I had no moral problems with the bump bump method.

    Personally, I think if you can't park anywhere, at anytime, then you shouldn't be driving.

    Then we wouldn't exactly have any drivers now would we? One of the first things you learn when parking in the real world is just how much pressure you can put on a car before there's damage. They don't teach that in drivers' ed.

  24. 1.5 carlengths??? by Mr.+Underbridge · · Score: 1
    Obviously she's not from a large U.S. city. I need a formula for *this* part alone!

    No shit dude. Christ, my grandmother could park a car in that and she's dead. The real skill lies in parking in a space that's 6 inches longer than the diagonal of your car, which is effectively how long your car is while you're midway through parking.

    Clearly, this guide is for women. Any guy who can't park in a space 1.5 carlengths long needs to have an "F" in the gender on his license.

  25. How stunt drivers do it. by TheLink · · Score: 2, Funny

    Get front wheel drive manual car with a very very good handbrake.

    Head towards the parking spot at a fair speed, as perpendicular to the spot as you can. Swerve car and pull handbrake and then brake and counter steer so that you neatly skid and slide in sideways.

    With this method you can park in a spot that's practically the same length as your car - just depends on how accurate you are.

    Getting out requires a bit more space - the length of the space must be slightly more than the diagonal length of your car. Pull handbrake to max, turn steering wheel max (to lock) towards side you want to exit from. Stomp on clutch, red line engine, release clutch, burn rubber and gradually spin car out of space.

    Not recommended in uncontrolled environments ;).

    --
    1. Re:How stunt drivers do it. by TXG1112 · · Score: 1

      I have done somthing similar to this in deep snow, with my AWD subaru. I managed to get all 4 wheels spinning to the point where my car slid sideways into a space.

      --
      I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered. My life is my own.
  26. German references by shades6666 · · Score: 1

    Googled for more information and found the following two articles in German
    Mathematikerin entwickelt Formel zum Einparken

    Frauen entdecken das Einparken

    the second has a different version of the formula:
    p=r-w/2, g)-w+2r+b, f)-w+2r-fg max((r+w/2)+f, (r+w/2)+b)£min((2r), (r+w/2+k))

    Still doesn't make a whole lot of sense with unopened brackets and commas that don't appear to be separating parameters of a function.

  27. Tight... by judowillreturns · · Score: 2, Funny

    Caption: "TIGHT FIT: A female mathematician..."
    A tight fit eh...

    Mod me down...

  28. ROTFLMAO by Archfeld · · Score: 1

    an F in gender :) Thanks, today has been a royal BIATCH and that got a big rolling laugh started.

    --
    errr....umm...*whooosh* *whoosh* Is this thing on ?