Road infrastructure improvements

HervéLamouroux

- Be able to fine tune merging roads with node tangents more precisely than actually (due to dynamic layout limitations). Also, getting more parameters for junctionintersection type Very useful for highways/motorways networks

- "intelligent"  road shape merging when connecting roads segments with different width/ lanes width. For example, dividers can be roughly cut 

AndreasHeldt

More specifically, detailed "lane" management would be very practical, allowing to:

- Split up lane into several lanes (e.g. before a crossing to allow lanes going into several directions)
- Merge multiple lanes into single lane
- Fork lane off the street (e.g. for crossings with separate right turns)
- Merge lane into street (e.g. merging back right turn lane into street)

I think the integration of "lanes" would be a powerful concept, as it would allow you to set parameters on single lanes, like: 

- Direction (where can we turn at the next crossing)
- Speed limits
- Other lane attributes (e.g. disallowed for heavy vehicles)

Even sidewalks could be treated as lanes themselves.