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Purple line speeds:

Take an LRV operational acceleration of 1.3 m/s2. Take the station spacing for that part of the route. Estimate a max speed of 26 m/s (58 mph). The idealized travel time, stopping at each station but no dwell time, is 5.5 minutes. Even including the slow periods easing in and out the stations, that's an average speed of about 45 mph. I think that's an overestimate because of the curves and grade changes on the route, but I also think a dwell time of 1 minute a station is also overstated. Increase the travelling time from 5.5 minutes to 6.5 minutes with a dwell time of 40 seconds for each of the 3 stops, and you are right at the proposed 8.5 minutes.

by Brian D on Nov 7, 2011 3:17 pm • link • report

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