User:Atrophicshiner/sandbox View history

Turn lanes

Firstly, the majority of junctions do not need turn lanes at all. We usually prefer to map junctions simply, and rely on Waze giving advanced warning of upcoming turns. Turn lanes are only really needed if they are really long, or the junction is sufficiently complicated to need clearer navigation instructions.

If turn lanes really are of benefit to the driver, then they should be mapped in the following way:

• The turn lane segments should have no name, so that the instructions read out the name of the next street.
• The road type should match the type of the roads they lead to (and never ramps). Only the main carriageway stays as the higher road type.
• The angle at the beginning of the turn lane should be shallow, so that Waze says "keep left/right" at that point.
• The end of the turn lane should have a clear "turn left" instruction near to the give-way point, unless the traffic obviously flows onto the new road with right-of-way.