In Openstreetmap only a physical barrier (or a patch of grass) between the lanes makes it necessary to map it as two ways. So yes that's the convention in Openstretmap.

In Openstreetmap only a physical barrier between the lanes makes it necessary to map it as two ways. So yes that's the convention in Openstretmap, and that's how I map at least.Openstretmap.

In Openstreetmap only a physical barrier between the lanes makes it necessary to map it as two ways. So yes that's the convention in Openstretmap, and that's how I map at least.