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Strange recommended cycle route #3129

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openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments
Closed

Strange recommended cycle route #3129

openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments

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@openstreetmap-trac
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Reporter: tko
[Submitted to the original trac issue database at 4.28pm, Sunday, 18th July 2010]

Going west on Kensington Road routing engine wants to take a strange detour to Hyde Park Gate which adds four turns and crossing one intersection. Only happens with recommended cycle route.

http://nroets.dev.openstreetmap.org/demo/index.html?lat=51.50132&lon=-0.18109&zoom=18&markers=!51.50145,-0.17997!51.50135,-0.1822&v=bicycle&fast=1

@openstreetmap-trac
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Author: openstreetmap[at]rational.co.za
[Added to the original trac issue at 5.40pm, Sunday, 18th July 2010]

Note that the purpose of 'Recommended' is to provide a good balance between travel time, distance, safety and comfort to an average person. I guess you and me are aggressive cyclists who don't mind cutting through traffic and we are not really the intended audience.

I want to add code that inspects each junction and add penalties for unnecessary turns, but my first attempt created more "hitches" than it resolved.

@openstreetmap-trac
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Author: tko
[Added to the original trac issue at 7.04pm, Sunday, 18th July 2010]

Maybe I can manage traffic better than average person, but that doesn't mean I enjoy it. I still prefer slightly longer routes that are quieter or have less turns.

Anyway, I just saw that detour as part of longer route and it felt the routing engine was too eager to take it for anyone's tastes. Come to think of it, in a short trip such as this one the recommended route would actually be the better one almost always as the detour makes the whole trip significantly safer - however as part of a longer trip the improvement is insignificant and (IMO) cancelled by the extra turns and junction.

Not an easy problem to solve I imagine.

@openstreetmap-trac
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Author: mmd
[Added to the original trac issue at 6.50pm, Tuesday, 19th May 2020]

Gosmore project is no longer active, closing.

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