China Abandons Long-Distance Maglev Effort
Ralph Lee writes "China has chosen to abandon its Maglev train effort from Beijing-Shanghai, according to this AP story: 'Besides cost, "the maglev technique was excluded because it does not match the wheel-track technique used by railways in China," the report said, citing Wang Derong, vice-chairman of the China Transport Association.... The scrapping of the 9-year-old maglev project - two weeks after the country's first maglev, a short stretch in Shanghai, began regular operation - represents a setback for the development of the technology in China, which many had seen as one of its key markets.'" The short 18-mile MagLev run mentioned earlier remains in operation, but China is not going to use magnetic levitation for the planned 750-mile Beijing-Shanghai link.
If you put a fast train on a 100year old track, you will never be able to reach 300km/h.
Yes you will, but only once. The French did speed trials in the 70s with conventional train engines and cars (well, apart the engine that had more power), to test the limits of conventional railways, and they reached about 300Km with that train, but the rail track behind the train was all bent out of shape as a result. I saw a very impressive photo of that bent track once, but I can't seem to find it anymore.
"A door is what a dog is perpetually on the wrong side of" - Ogden Nash
The true high speed trains (like some in france, and the new one going under the mountain chain in Europe, I don't remember what it's called) have to use specially layed track. Those sorts of high speed trains (due to the speed and the wave in the track that it generates ahead of the train) cannot handle the "flaws" used in regular track. It needs track that is bound much more securely to the ground to limit the wave generated in the rail, requires a sturdier railbed, require very strait track (only very gradual curves due to the speed) and many of them are electric requiring lines to be run anyways.
It's not as simple as everyone thinks to just slap a high speed train on regular track.