On 25/09/2024 21:44, Chris Pankhurst via Talk-GB wrote:
I am looking at a junction in London where I am not clear whether a u-turn is allowed or not. The location the junction between Edgeware Road and Praed Street and Chapel Street traveling from NW din a SE direction. There is straight ahead arrow on the right lane and there is no right turn sign at the junction. Also there is no no u-turn sign there and OSM does not have a No U Turn Relation on the approach way so implying u-turns are allowed here. The question I have is can you make a u-turn on Edgeware Road to come back on Edgeware road in a NW direction: from 51.5193824, -0.1691434 to 51.5193073, -0.1692058 and hence OSM is correct?
Absent a sign prohibiting it then it's probably allowed when there's a full green on the lights. It's just possible all the greens have filter arrows which might effectively prohibit it. I certainly wouldn't recommend it though - that kind of u-turn on a dual carriageway at a junction is a fairly common thing in the US I think but it's not something people will be expecting here and there's a good chance the oncoming traffic will have green at the same time making it hard to do in practice.
And a broader question is what signs, incl. road markings, have to be in place for a u-turn to be prohibited. I have seen a number of conversations on traffic forums but have not seen a conclusive answer and I understand there are possible variables depending on the city, region, etc.
I can't think of any reason why city or region would make any sort of difference - traffic rules are the same everywhere and any local traffic order prohibiting u-turns would have to be reflected in standard signage to be effective. Tom -- Tom Hughes ([email protected]) http://compton.nu/ _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
