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.
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