Big Blue Bus speedmap segments deep dive

[tiffanychu90]

segment speeds

• deep dive into Big Blue Bus and compare 2 methods of nearest neighbor
• first, see how our vp that dwell in that location affect what speed is calculated
• if it doesn't matter which vp is selected, then speed won't change much. if speed is sensitive to what's our "universe of valid vehicle positions" to check for each stop position, then that could be a complicating factor
• conclusion / decision point: we do need dwell_time, because even though a very small number of rows are affected by dwelling vp, the speeds that are calculated vary by a lot. this means that speed is sensitive to what nearest_vp_idx is selected.
• Research Request - Nearest neighbor comparison  #1162

[github-actions]

nbviewer URLs for impacted notebooks:

• rt_segment_speeds/35_bbb_segment_backtrack.ipynb
• rt_segment_speeds/36_bbb_nn_with_unknowns.ipynb
• rt_segment_speeds/37_bbb_altered_nn.ipynb