[Routing] [motorway_link] description of direction

[Marcus Wolschon]

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Jon Bright schrieb:

| For some complicated 4-lane thing.  (I'd suggest those lanes be counted
| from left to right, since that's the direction that most OSM users
| currently read in).
|
| Doing this like this would also give you extra value: at the moment,
| stuff outputting routing directions doesn't know which lane to tell you
| to be in.

If you have multiple lanes that lead to different locations
I suggest modelling them as multiple ways from the latest location
where a sensible lane-change is possible.

For example in Tübingen we have a crossing with a 2-lane way right
but both lanes head for different locations right after the crossing.
Thus I would model them as 2 1-lane -ways since it is no longer
possible to change the lane after the crossing and before they head
into different parts of the town.

Marcus

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