PeMS exploratory for flow/obs_flow vs speed/obs_speed

[tiffanychu90]

PeMS

• Switch aggregation to means instead of sums for flow.
• Also move away from partitioned parquets, these grains are small enough to be single parquets.
• Produce the most aggregated version so we can start tying it geospatial data (postmiles) etc and see how we combine station metrics to get corridor metrics
  • Add new grain = station-daytype-hour -- filename pattern is station_daytype_hour_{metric}
• Add segment_speed_utils.helpers.if_exists_then_delete() to shared_utils.publish_utils, since it's related to GCS filesystem cleanup
  • Keep Traffic Ops stuff distinct from GTFS stuff (any function that can be lifted from segment_speed_utils should move into shared_utils)
• Epic - PeMS Roadmap #1139

[github-actions]

nbviewer URLs for impacted notebooks:

• traffic_ops/01_observed_flow_speed.ipynb

[github-actions]

nbviewer URLs for impacted notebooks:

• traffic_ops/01_observed_flow_speed.ipynb

[github-actions]

nbviewer URLs for impacted notebooks:

• traffic_ops/01_observed_flow_speed.ipynb

[github-actions]

nbviewer URLs for impacted notebooks:

• traffic_ops/01_observed_flow_speed.ipynb

[github-actions]

nbviewer URLs for impacted notebooks:

• traffic_ops/01_observed_flow_speed.ipynb