On Sat, 2020-10-03 at 18:36 +0200, Colin Smale wrote: > On 2020-10-03 18:16, Tom Hughes via Talk-GB wrote: > > On 03/10/2020 16:57, Philip Barnes wrote: > > > > > > > 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. > > > > But unless the start or end point is on the flare why would a > > router do that over the shorter route on the roundabout... I mean > > maybe there are a few cases where the flare is shorter somehow? > > > > If you take that exit by accident, a fast router may tell you to take > the sharp turn back to the roundabout. Some flares are longer than > others, and some routers take longer than others to trigger the "off- > route" stuff. > > But then is it actually illegal? I am begining to wonder if these are mostly attempts to make QA tool tight turn warnings go away? Phil (trigpoint)
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