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Project Meeting 2020.10.22
Ben Stabler edited this page Oct 23, 2020
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5b/6a Task 1 Project Management (milestone)
- Nothing to discuss
5b Task 2 Strategic Planning (milestone)
- Partners discussing this afternoon
5b Task 10 Support for Three Zone Systems and TVPB (milestone)
- Nothing new since Tuesday since Jeff back to work tomorrow
- Discussed some Marin MAZ, TAP stats added to the Tuesday call notes
- We need to talk more with Jeff and Joel about the approach
- There's some concern about inefficiencies in the approach and maybe we should revise the design a bit
- We want a TVPB that considers various tradeoffs
- behaviorally strong
- built with good technology
- manageable
- affordable
- makes use of reasonable input data
- etc.
- SANDAG has about 60 taps per maz as well
- But not all maz-tap pairs are fully evaluated because some taps are further away and have duplicate service, some tap-tap pairs have no in-vehicle time, etc.
- We pre-compute the path components and then select N best paths for omaz, dmaz, tod, demographic segment
- It's important the user builds a reasonable maz-tap network or otherwise there are major performance issues
- Need to sharpen up our focus, describe tradeoffs, unknowns, etc. We're spending a lot on this task and we need to make sure we have a good plan.
- So let's pause for a sec and discuss the design some more
- Another feature we could add is label taps by mode, sort by distance, and then make sure we get at least one tap for each mode up to a max distance
- With new technology like e-bikes, max transit access distances get even longer so more paths considered
- Next steps, let's get some documentation on TVPB, pros/cons, design considerations, how geography is defined, challenges (data, runtimes, etc.)
- Assignment algorithms are getting better and better, can we just use them instead?
- TVPB has lots of good features - builds path sets with more line-haul modes, solves issues with transit access connector issues in network assignment, more sensitive to policy issues, etc.
- Do we have some proof of the benefits? Maybe a study with and without TVPB?
- Bill, Wu, Joel, Jeff, me collect some info to discuss Tusday
6a Task 2 Complete Estimation Mode (milestone)
- Newman started, and plans for a basic demo next week
- It's more difficult to interpret the EDB for CDAP and may have some questions for Doyle
6a Task 3 Telecommute Model in Cooperation with SEMCOG (milestone)
- Joel started on the design based on what was done for SANDAG
- Mobility model that predicts days per week typically telecommute
- Based on SEMCOG's 2018 data
- Still need to work on considerations related to telecommuting under COVID
- Plans to talk with Jilan next week and then the ActivitySim team the week after