[Talk-us] Relation roles

[Nathan Edgars II]

On 6/29/2011 3:28 PM, Josh Doe wrote:
> On Wed, Jun 29, 2011 at 3:06 PM, Nathan Edgars II <neroute2 at gmail.com
> <mailto:neroute2 at gmail.com>> wrote:
>
>     On 6/29/2011 2:49 PM, Nathan Mills wrote:
>
>         It also avoids the inevitable "which way is
>         forward and which is backward" question.
>
>     Forward is the direction of the way. If a way carries both
>     directions of the route, it gets no role (as with directional roles).
>
>
> I'm a little slow here; forward means the route follows the direction of
> the way (order of nodes), so for dual carriageways if the ways are in:
> * opposite directions: they would both have oneway=yes and both use the
> forward role?
> * same direction: one would have oneway=yes and the forward role, the
> other with oneway=-1 and the backward role? I find it a little confusing...

Yes. This is the standard for bus and bike routes, as well as highway 
routes in most countries. JOSM makes it easy to sort a relation this way.