Hi Tom, Thank you for your very fast response to my questions. I appear to be aligned with you that u-turn here is possible, not explicitly permitted, but probably allowed with caution unless there is another sign e.g. filtering sign on the green light. In this instance using Bing Streetside and sensor derived traffic signs I see no additional restrictions on the green light of the traffic lights to restrict a u-turn here. Also, thank you for confirming that traffic rules pertaining to this and other situations elsewhere in in GBR are very unlikely to be different and would employ the same traffic signs for same/similar scenarios.
Thanks again. Regards Chris -----Original Message----- From: Tom Hughes <[email protected]> Sent: Wednesday, September 25, 2024 5:25 PM To: Chris Pankhurst <[email protected]>; [email protected] Subject: Re: U-Turn guidance in London [You don't often get email from [email protected]. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] 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
