Segment between avenue ways

There is no hard & fast answer, but in general I would treat the dual carriageway avenue as if it was a single street, so that whether coming from the left or the right routing instructions would tell you to turn into Seredo Braun. This means continuing the street across both carriageways of the avenue.

The alternatives are:

• Map the crossing sections as un-named highways of the same class as the main road (as in your example)
• Map the crossing sections as un-named highway links of the same class as the main road.

Both may be highly suitable in other situations: for instance when the road network was constructed de novo with a dual carriageway as the main road, or when junctions are more complex, or when the roads on either side of a crossing have different names; or when the linking sections have different speed limits from the side roads. The disadvantages of the latter two approaches are more obvious in two situations:

• Routing : short un-named sections may make providing useful directions (especially for voice) rather harder.
• Generalisation: if we want to combine the two carriageways into a single line for representation on a medium scale map or for simplified routing (eg. for distance matrices) there is no need to worry about how to handle the highways connecting across the carriageways.

I think that it is also worthwhile using the simplest approach which can be readily set-out for all mappers.