On Thu, 24 Oct 2019 at 23:42, Paul Johnson <[email protected]> wrote:
> > I hate to be a stick in the mud, but whether or not it's legally > traversable doesn't seem to have much bearing on whether or not it's > physically traversable. > If it's not physically traversable then it IS illegal to drive over it. Take your pick of traffic violations, starting with "driving without due care and attention." If it is physically traversable then it MAY still be illegal to drive over it, or MAY be illegal to drive over it unless your vehicle is above a certain length (the latter is the case for UK mini roundabouts). Why do I say legality matters more than physical appearance? Turn-by-turn navigation systems and the consequences of our mapping encouraging people to break the law. Before I'm accused of ignoring the rest of the world, it's possible we may need other classes of circular junction in addition to rotaries, roundabouts and mini roundabouts, but those are all I know of so far. The traffic regulations concerning them are different, so we should not map them identically. Nor should we hope that routers have adequate heuristics to distinguish between roundabouts and mini roundabouts based upon size, as what the router thinks and what the signage/regulations say may differ. -- Paul
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