There is a lot of garbage in OSM due to those creating routers being too
lazy to write a few lines of code, or even use common sense.
However, in this case I believe it's other contributors who think, for
reasons that escape me, routers require it.
Routing software must be of a poor standard if it returns the commuter
to the roundabout after just 10 metres or so after leaving it.
I partially agree with Phil's suggestion that they're harmless, if
turn restrictions are by themselves. However if there are multiple at
one junction it can become error prone. Any that aren't required are
best removed.
DaveF
On 03/10/2020 14:05, Brian Prangle wrote:
Hi
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.
Regards
Brian
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