[Tagging] access restrictions on ways

[Martin Vonwald]

Am 19.09.2012 um 20:36 schrieb André Pirard <A_Pirard at hotmail.com>:

> BTW, I'm wondering about that "forward".

If I understood you correct(!) this restriction should block traffic going in. If anyone manages to get into the town without passing that signpost (don't ask me how) he is allowed to leave town on that road.
Usually this kind of restrictions are bidirectional. I guess that it won't matter too much if you skip the ":forward" but I know the place only from your description.

> Why have a direction depend on an arbitrary one that could be inverted carelessly.
> Not all programs are as smart as JOSM to detect that a tag must be changed accordingly!

We have to rely on our mappers. When I look at our map(s) I think that the are quite ok ;-)

> Why not North, East, South and West?
> Clockwise and Anticlockwise or such if we don't want to split Circle Line?

Because this might be ambiguous and is much harder to process by data consumers.

Regards,
Martin