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Lots of great feedback!
@Rob - of course we'd love to get a much better handle on the selection bias, but we were just starting with an easy-to-get dataset which CaBi was great for. Your idea of spatially separating those trips that are near transit stops/stations is neat and I'll see if we can follow up on it if we open this back up. If someone has a highly refined transit O-D database for the region, I'd love to see it.

Some other good ideas about how to generate walk time - i like @egk's a lot. Keep 'em coming.

And yes, @mm - OTP has every transit trip in the DC region modeled so we count wait time. If someone left at 8:42am on a tuesday, we simulated a transit trip that departs at 8:42 on a tuesday including any associated wait time. We assume you left when you wanted to and wouldn't defer your trip to not wait for a bus (simplifying assumption).

by James Wong on Jun 13, 2012 3:45 pm • link • report

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