I tried to change the code in OverlapRemover so that it can handle the case
when a roundabout is overlapped
by another (flare) road. The current code in r4149 would not allow that unless
both are roundabouts.
The default style also assigns different road_speed values to roundabouts.
So I can change the code to
1) also ignore road_speed when one way is a roundabout
or I can change the code to
2) always allow different road_speed values.
If we select 2) I'd say that mkgmap should keep the smaller value.
What do you think?
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