[Talk-GB] Relation for M5?

[Colin Smale]

On 08/10/2011 16:42, Richard Fairhurst wrote:
> In the UK, each road can only belong to one route (i.e. an unambiguous 
> ref= tag). There is no need for road route relations; the M5 motorway 
> is more easily defined as "all ways within the UK bounding box with 
> the tags highway=motorway* and ref=M5". Consequently we don't use road 
> route relations in the UK.
That's a bit of a sweeping statement!

I can think of several cases when they would be useful:
* there are lots of stretches of roads with (ostensibly) two UK numbers 
(segment is shared between two routes)
* E-routes forming a network which overlays the national network
* well-known routes like "South Circular" which are made from bits of 
lots of different roads
* roads such as the A1 which are part motorway with a different ref - an 
"A1" relation could be continuous from London to Edinburgh

--colin