[Research] Connections of lanes of different width

[Agustin Alba Chicar]

The use case can be shown on this image of issue #120. As it is shown there, a small road is matched with another that has a different width.

There are a couple of things to evaluate when implementing a solution to this:

• Check first the possibility to define variable lane_bounds and driveable_bounds from Maliput's API.
• Evaluate the case where the width of the lane makes it overlap with the incoming / outgoing lane.
• Contrast with OpenDrive specification which might have more details on this.