University of Washington, Taskar Center for Accessible Technology

Just a note that the crossing=marked/unmaked tags have now been deprecated. For markings, please use the tags: crossing:markings=yes/no. The uncontrolled crossing type is still unfortunately not well understood by users,...

@leonardehrenfried, @westontrillium @tsherlockcraig et al. I wanted to note that this problem surfaces a deeper problem with GTFS-flex, and is not just an edge case. The summary of the problem...

Hi again. TL;DR: There will always be tension between data producers & data consumers, but only the end-device-users pay the price for badly formed schemas. We need to produce excellent,...

@westontrillium Thank you for this explanation. Here is the explicit concern: With the proposed extension to Stop_times.txt, my understanding is that tripA is ambiguous but allowed (it is a riff...

I agree on that clarification. In addition, should the clarification state what happens if the trip requested from Zone 1 to Zone 3 falls between 8:00-10:00? I did not see...

I find it unsettling that having a consistent "read" on the flex schema is dependent on the (possibly wildly) different time estimates downstream consuming routers would make regarding traversals from...

There's a difference between uncertainty and ambiguity. Flex services incorporate a natural uncertainty. However, a schema should, to the best of our ability as its designers, remove ambiguity. There are...