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Experiment with higher penalties for bus routes #159

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abhumbla opened this issue Jun 27, 2024 · 3 comments
Open

Experiment with higher penalties for bus routes #159

abhumbla opened this issue Jun 27, 2024 · 3 comments
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@abhumbla
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maybe it should be 2

@graue
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graue commented Jun 28, 2024

Why?

@abhumbla
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abhumbla commented Jun 28, 2024

there's a bunch of cases I've seen where we prefer the bus over the train where I don't think we should. I want to see what increasing the bus penalty will do. if it produces bad results we don't have to make it permanent. but even just getting the code in a state where I can give different modes of transit different penalties will be useful

@graue graue changed the title Give bus routes a higher penalty Experiment with higher penalties for bus routes Jun 28, 2024
@graue
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graue commented Jun 28, 2024

Makes sense. I changed the name of the issue to reflect that it's an experiment and not necessarily something we agree to do.

there's a bunch of cases I've seen where we prefer the bus over the train where I don't think we should.

I agree with this. In those cases I usually see the bike->bus->bike route taking significantly longer than the bike->train->bike route would. I suspect it's largely because there are high penalties for the roads immediately around the train station. Alternative approaches to fix could be:

  • Reduce penalties across the board. As I mentioned, I think we're often not doing a great job estimating the level of safety/comfort a route offers, so we could try de-emphasizing the penalties to reflect that limited confidence.
  • Reduce penalties when close to a train station
  • Instead of letting a bike->bus->bike route trump a bike->train->bike route, return both
  • Install guerrilla protected bike lanes around BART stations

FWIW, bus can be better because quicker to access/less schlepping. In some ways we currently undercount the cost to use trains because we don't model the schlepping, or the full amount of time required to carry a bike down to the platform on elevators.

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