On Sat, 2020-10-03 at 16:50 +0100, Tom Hughes via Talk-GB wrote: > On 03/10/2020 14:05, Brian Prangle wrote: > > > There seems to be a predilection for adding turn restrictions , > > either > > no right rurns or no U turns at the exit flares of roundabouts to > > prevent turning back into the entry flares where there are no > > explicit > > signed restrictions. I suspect this is "rendering for routers". Do > > routers actually need this data? I'm tempted just to delete them > > all > > wherever I meet them, but I suspect there are thousands of them > > and > > there'll be howls of complaint. > > Surely if there is a flare then the entry half of the flare will > be one-way against anybody turning off which should exclude it from
Tom They are intended to stop this type of routing https://www.openstreetmap.org/directions?engine=graphhopper_car&route=52.64994%2C-1.20491%3B52.64983%2C-1.2049 Which is techincally not illegal and in real world usage is not going to happen. Phil (trigpoint)
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