Quoting Mark Burton <markb@ordern.com>:

The attached small patch implements a --rhd option that sets a couple of bits in the map data that tell the GPS that the vehicles are RHD and that roundabouts are navigated in a clockwise direction. This will make the little roundabout piccy shown in the top left of the screen (on the Nuvis, at least) have the correct sense for the few countries that drive on the left.

Should have done this months ago when it was previously discussed, sorry.

It could be done automatically by sensing the roundabout direction but I'm feeling too lazy to write that code for now.

Mark

I thought roundabout direction was already "sensed" this way? My GPS has routed me the "right" way and the "wrong" way around roundabouts, and the "wrong" way ones are always those where the underlying OSM data has the way going in the wrong direction (which I have then subsequently corrected where I remember). And maybe I'm quibbling on semantics, but shouldn't the --rhd apply to the road system/map, rather than the vehicles on it? After all, left-hand drive vehicles can drive in the UK, for instance? -- Charlie