3 ms·
>each other, the maximum is 33,000 cars per hour. Yeah, but that's 33,000 cars per hour without any of the cars stopping to exit the tunnels. The trains used i
by so33 9y ago
>each other, the maximum is 33,000 cars per hour.
Yeah, but that's 33,000 cars per hour without any of the cars stopping to exit the tunnels. The trains used in BART and other public transit systems can very easily exceed 60+mph already, but they don't because they have to stop, bringing down the average speed of the system.
BART, by the way, does 28000 passengers per hour per direction in the Transbay Tube (https://en.wikipedia.org/wiki/Transbay_Tube https://en.wikipedia.org/wiki/Transbay_Tube). You can probably fit over 200 people into a BART train car at absolute crush capacity.
- njarboe 9y agoBy the way, the maximum rate of 60,000/hour in each direction for BART I quoted was from BART itself[1]. I should have provided a link. Primary sources are good. Of course the sleds in an operating system would not be absolutely packed together. This was just a Fermi estimation to get some idea of the flow rate the parent comment was wondering about. Looks like max rates would vary from somewhat worse than trains to much better. The sleds would be automated so that when one wants to exit the others would give it enough space to do so without problems. Another Fermi estimation could be done to get an idea of how long the exit tunnel would need to be for a sled to stop given a range of deceleration rates. I think Musk is on the right track but that his biggest hurdles may be social and political in the USA. Maybe China or India will want to try it out (or the Swiss). [1] https://www.bart.gov/sites/default/files/docs/2016Factsheet_v12.pdf https://www.bart.gov/sites/default/files/docs/2016Factsheet_...