this post was submitted on 28 Sep 2024
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Bloomington Indiana

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I just added some max_speed= tags for #OpenStreetMap in Bloomington, Indiana.

Our city code has a default speed limit 25 mph. Exceptions are published in a table in the city code.

It seems possible that adding the correct lower-than-default speed limits from city code to OpenStreetMap could reduce the likelihood that routing algorithms would route car traffic there, which could in turn keep the street safer for other road users.

Ref: https://library.municode.com/in/bloomington/codes/code_of_ordinances?nodeId=TIT15VETR_CH15.24SPRE

@bloomington_in

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[–] [email protected] 1 points 1 month ago (18 children)

@markstos @bloomington_in on the other side, bike routing likely gets better too

[–] [email protected] 0 points 1 month ago (17 children)

@DemonHusky @markstos @bloomington_in Bike routes will get more direct, but "better" may not be applicable, since the more direct routes also encourage drivers to speed

That said cities tend to add bike lanes only after people get annoyed with bike traffic, so maybe down the road it might add some lane miles

[–] [email protected] 1 points 1 month ago (16 children)

@pleaseclap @DemonHusky @bloomington_in I can’t see how any routes will become more direct for anyone, because no new more direct paths are being added.

Tagging a slow speed limit is a signal that cars may want to take a less direct route on streets with faster speed limits, while tagging a high speed limit is a signal for bike routing that cyclists may be less safe and may themselves prefer a less direct but safer route.

[–] [email protected] 1 points 1 month ago

@markstos @pleaseclap @bloomington_in without knowing the local area, I was thinking not that there might be basically parallel routes with different speed limits, and car routing would choose the higher limit option, while bike routing chooses the lower limit option. But with the assumption that the limits reflect something else about the road condition and how comfortable biking is, the routing algorithm now has a better signal to choose the better route

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