Avg speeds

[tiffanychu90]

segment speeds

• for trip-level speeds, start with vp already sjoined to segments, then triangulate and select 5 vp per trip to calculate the change in distance and change in time
  • must use vp joined to segments because otherwise too many excess vp not traveling near shape appear, and that throws off speed calculations
• drop extremely low and high speeds and then calculate the average speed for route-direction-time_of_day
• attach the common_shape_id for the shape with most trips for route-direction combination
• if we can't bundle the tabular dataset along with our segment speeds layer, then we will publish this as its own layer with the shape's line geometry
• attach organization source_record_id, name, caltrans_district and standardize route names
• in addition to speed_mph, include n_trips, avg_scheduled_trip_min, and avg_rt_trip_min (approximated based on vp timestamps)
• Research Request - New speed tables: trip average speeds and average route speeds by time-of-day #790
• Research Request - speeds by stop segments published to open data #761

TODO:

• checked with the Caltrans GIS...need to update our metadata for new documentation standards
• not sure if tabular data can be associated with an existing layer
• considered publishing wide dataset with columns like am_peak_speed, am_peak_n_trips, but this gets a little unwieldly if we want to make available more metrics beyond speed and n_trips.

[github-actions]

nbviewer URLs for impacted notebooks:

• rt_segment_speeds/scripts/calculate-trip-avg.ipynb

[github-actions]

nbviewer URLs for impacted notebooks:

• rt_segment_speeds/scripts/calculate-trip-avg.ipynb