[Routing] Missing a turn?

[Philip Barnes]

On Sat, 2012-11-24 at 18:55 +0100, Colin Smale wrote:
> This is probably triggered by the fact that there are two legs of the 
> junction named Thornton Lane which are assumed to form the 
> straight-through route, making Main Street a "side road".
> 
> Mkgmap recognises a relation with type=through_route, having two ways 
> and a node as members (roles not needed) for exactly this case. It works 
> fine in mkgmap, but I don't believe it is documented anywhere properly 
> at the moment.
Thanks Colin
That looks like what we need.

I suspect in the dim and distant past this junction was re-engineered to
ease traffic flow, my memory goes back about 30 years and it has not
changed in that time. Looking at it on the ground, that is clearly what
has happened, the right turn from Main Street would have been evil at
rush hour. 

I will investigate through_route further.

Thanks
Phil