Research Request - Segment stability in speed time-series

[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: We have aggregated speeds for segments. Explore how well we can match a segment over time (start with roughly 16+ month period) so we can see how speeds change over a route geographic entity.

Detailed description: Start with stop_segments, which handles intra-day shape variation and combine that with how we've standardized route naming across months.

• time harmonization Research Request - refactor segment speed exports  #992
• route_ids typically change in a 6 month period....shape_ids change within 2-3 months` Epic - GTFS Digest (exploratory portfolio) #989 and done in Digest ymls #1074
• If this is promising, we can borrow this and use for roads to aggregate even further across operators and routes to actually identify the same geographic entity Epic - Transit speeds on road segments #916

How will this research be used?

What will be achieved or informed? What is the intended impact?

Data sources

• Cal-ITP data sources: aggregated segment speeds

Deliverables

Notebook