[OSM-talk] Cycle junction networks (was "Unsurfaced road" and "Byway"?)

[Dave Stubbs]

On 18/12/2007, Gregory <nomoregrapes at googlemail.com> wrote:
> Can we clarify why there are two routes on one way?
>
> Is it that at junctions there are signs saying:
> -left is route 10
> -also go left if you want route 20
>
> To me that suggests that the route to the left should *only* be tagged as
> route 10, when it gets to route 20, that should be tagged as route 20.
> When planning a route and looking at the map, you need to know "I go along
> route 10, and when I get to route 20 I go along that, untill the landmark
> where I turn off to get to my destination". Doing that would be pretty
> normal for me.

You're thinking in the wrong way.

Just think of the junctions as points you want to get to. We happen to
number them. I want to get to "junction" or "node" (however we
translate it) number 10 -- there are routes between each numbered
point, so to get there I figure out which points I have to go via then
follow the signs in order. It's the same idea as navigating round the
country by working out which towns are on the way then following the
signs till you see the next town on your list (only slightly more
organised and rational).

A map is pretty essential here :-)

Dave