[Tagging] Tagging u-turn restriction with continuous painted line

Janko Mihelić janjko at gmail.com
Tue Jul 3 13:12:16 BST 2012

2012/7/3 Philip Barnes <phil at trigpoint.me.uk>

> The router does need fixing however as U-turns around a roundabout divider
> island are rarely sensible and should not be treated as a junction.
> Phil

I think this is the wrong way to look at this. If you rely on routers to
make this kinds of decisions, you are going to have a lot of problems. What
if there was a roundabout island where you were allowed to u-turn? You
should put in a "allow_roundabout_u_turn" or something. Also, some routers
are not going to have the same logic.

Anyway, if you don't put a "no_u_turn" restriction in this case, routers
are rarely going to route through that, so I think we are safe either way :)

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