Research Request - Exploratory work related to road segment speeds

[tiffanychu90]

Complete the below when receiving a research request, and continue to add to this issue as you receive additional details and produce deliverables. Be sure to also add the appropriate project-level label to this issue (eg gtfs-rt, DLA).

Research Question

Single sentence description: Moving segment speeds onto roads is an across time, across space, across operators aggregation. Set up exploratory notebook that picks a couple of examples to move away from shapes, a transit specific path, onto roads, the same physical entity, while retaining the order the bus vehicle positions travel.

• Epic - Transit speeds on road segments #916

Detailed description:

• vehicle positions are converted to meters relative to the shape's start
• shapes help us understand the order the segments are, but roads would lose that
• vp may not be present on each road segment. but even if it's missing on segment 2, if a vp is present on segment 1 and segment 3, we should be able to calculate speed, but need to do it in an efficient way (do it when necessary, and skip when not necessary, without trying all the roads)
• we know operators might share portions of their shapes, aka, while on Main Street, but deviate on other portions --> be able to aggregate and weight speeds by n_trips and flag n_operators, n_routes where there are multiple

How will this research be used?

This is the next phase of taking segment speeds further onto roads. Make the problem statement / challenge clearer.

Data sources

• Cal-ITP data sources: Existing segment speeds data + roads

Deliverables

• Notebook
• Scripts