Hi. I noticed an odd thing at a roundabout recently where my car tells me to enter a roundabout, and then while I'm in the roundabout it says to make a left turn (rather than just take a particular exit). AFAIK the navigation is at least partly based on OSM.
I looked at the roundabout in question and I see it is split into 4 ways ( e.g. https://www.openstreetmap.org/way/1413392271 in Ettalong NSW). I'm guessing the split is because of the routes that traverse the roundabout. (1 x bus route, and 1 x RCN cycle route) In this situation, would you make the routes apply to the entire roundabout and keep it as a single way? Or split the roundabout into multiple ways? Example: A one-way route turns left at a roundabout, and so normally only part of the roundabout would form part of the route. Technically you could go around the roundabout 1 1/4 times to take the same exit, so the whole roundabout might form part of the route. (e.g. You have teenagers in the car, and it's your role as a parent to tease them, but I digress...) Maybe it's up to the routing software to figure this out, but there could be strange configurations with multiple connected roundabouts, so actually it's hard to know that a different way is actually the same way. (Unless it is in a straight line, which of course it is not here.) Thoughts? - Ben Kelley.
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