by MCL1981
I just happened to notice a statistic on the wiki page that lists WMATA trains deceleration rate as about 3 mph per second in emergency. That would make the time to go from 55mph to a stop in emergency about 17 seconds. That couldn't possibly be the case. I've never had the displeasure of being on a Metro train when it goes into emergency at 55mph. But I can recall plenty of what seemed like full service braking from a high speed. And it seems like it was single digit seconds. I've been on a loaded MARC train with 6 cars in emergency from 55mph, it was single digit seconds I think, with a lot more mass to stop.
Anyone have any data on actual stopping distance or time?
Anyone have any data on actual stopping distance or time?