That's the same as on the London Underground, in 2011 they rolled out 30 trains per hour on the Jubilee line and a few years later on the Northern line. The Ju

That's the same as on the London Underground, in 2011 they rolled out 30 trains per hour on the Jubilee line and a few years later on the Northern line. The Jubilee line is 36km long, and each train is 125m [1] so that means there is on average just over a kilometer between each train at 30 trains per hour. That might sound like a lot, but stopping distances of trains are much greater than cars. First of all the trains weigh around 200 tons plus another 70 tons for passengers, and metal on metal doesn't have as much traction as car tires. Even if you could decelerate as fast as a car, everyone standing up is going to end up in a pretty bad shape after that so you need to do it slower. According to someone on StackOverflow passenger trains are designed to decelerate at 1.2m/s2 [2], which at 100km/h gives a stopping distance of 350m. [1] https://en.wikipedia.org/wiki/London_Underground_1996_Stock https://en.wikipedia.org/wiki/London_Underground_1996_Stock [2] https://www.quora.com/How-long-does-it-take-for-a-train-to-come-to-a-complete-emergency-stop https://www.quora.com/How-long-does-it-take-for-a-train-to-c...