> Yes, but it should be unique in each country. So it should be possible
> to use a mkgmap:drive_on=left or something similar.
>
sure, but what could mkgmap do with it if a tile contains more than one country?
The problem is that we cannot store the drive-on-left for each roundabout. The info
is stored once for each tile (well, once in TRE, once in NOD)

Gerd