Re:Ford CEO says the company 'overestimated' self-driving cars
by treis on Friday April 12, 2019 @04:42PM
(#19648771)
>With CTBC some platforms can run at 60 trains per hour (30 local, 30 express). That's 8 subway cars every 2 minutes, or approximately 1,000 people per minute.
Unless your trains are going at 10 kph you will have more of a gap than 300 meters if you see a train every 2 minutes.
Re:Ford CEO says the company 'overestimated' self-driving cars
by jacques_chester on Friday April 12, 2019 @06:07PM
(#19649490)
Or the trains can move much faster and much closer because of improved control.
You should recognise this argument: it's the same logic given for why self-driving will solve everything.
Re:Ford CEO says the company 'overestimated' self-driving cars
by treis on Friday April 12, 2019 @10:57PM
(#19650822)
But you're always limited by loading time. If you take X seconds at each stop then you will end up with X * speed distance between each car. Even at 30s loading and 50 kph you're looking at 400 meters between each train.
NYC's least efficient system is block train control, requiring 300M separation between trains.
In 300M you can fit about 66 Corollas, again packed bumper to bumper. That's 66 * 5 people = 330 people, or approximately 1.5 subway cars.
Subway trains are 6 or 8 subway cars long, depending on track and time of day.
With CTBC some platforms can run at 60 trains per hour (30 local, 30 express). That's 8 subway cars every 2 minutes, or approximately 1,000 people per minute.
To move 1,000 people at all with the Corollas you will need 250 * 4.55M of them, or approximately 1.1 kilometres of cars, bumper to bumper.