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Say two ways cross at an intersection, but it isn't legal to turn from one into the other. (E.g. a footway crossing a cycleway, or a separated bus lane crossing another road.) Is it okay to map such intersections as crossing ways which don't share a node, or is it better practice to add the crossing node, and then add turn restrictions denoting that no turns can be made? The former seems much simpler, but unfortunately triggers false positives from quality assurance tools.

asked 10 Jul '15, 14:46

Paul_012's gravatar image

accept rate: 33%

They should share a common node where they share a physical patch of asphalt (i.e. there's no bridges or tunnels).

For restricted use paths and roads, many turn restrictions are unnecessary. So in your example, if you have a path with bicycle=no, and a cycleway with foot=no, there's no need to add turn restrictions since the pedestrians aren't allowed on the cycleway and the bikes aren't allowed on the path.

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answered 10 Jul '15, 16:10

Andy%20Allan's gravatar image

Andy Allan
accept rate: 28%

Skipping the common node at the intersection will also prevent pedestrians from going from one road to the other. Moreover, various turn restrictions don't apply to emergency vehicles. Therefore you should always add a turn restriction instead of skipping the common node.

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answered 13 Jul '15, 10:36

scai's gravatar image

scai ♦
accept rate: 23%

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question asked: 10 Jul '15, 14:46

question was seen: 2,865 times

last updated: 13 Jul '15, 10:36

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum