|
|
| Re: Video showing Paris Metro Line 1 headway (896713) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: Video showing Paris Metro Line 1 headway |
|
|
Posted by Stephen Bauman on Mon Feb 8 12:29:40 2010, in response to Video showing Paris Metro Line 1 headway, posted by Easy on Sun Feb 7 21:27:24 2010. I'd dreamed of placing a minicam with a timestamp at a train station to record data, after I froze on an early morning escapade a fortnight ago. The only thing that has stops me is the realization that such an unauthorized tie wrapped item in a station would cause a bomb scare. This youtube video gives me a hint of what arm chair data collection should be.This video saw 4 trains arrive and depart in 5 1/2 minutes. The average headway (between door openings) was 88.67 seconds with a standard deviation of 9.61 seconds. That comes out to 40 tph. The average dwell time was 35.67 seconds with a standard deviation of 8.39 seconds. The standard deviations as a percentage of the mean are far lower than what I've observed for TA operations. The average braking time (time from when train first enters station to when doors open) was 14 seconds with a standard deviation of 1 second. These are within the experimental errors of using youtube's elapsed timer as my time standard. My guess is that some form of ATO is used to get repeatability like that. Unfortunately, the camera panned away from the track and missed the departure of the second train. I would have liked to have calculated the headway as measured by train departure. If the ATS corrects the departure to keep schedule, then I would expect that the standard deviation of the departure headway would be tighter than the arrival headway. |
|
|
|