Consider https://www.openstreetmap.org/#map=17/42.85888/-73.77169. As I
write this, I-87 is annotated as having 3 lanes south of the on/off
ramps (south of 146). However, the off ramp starts all the way back at
the Sitterly Road overpass, and the on ramp doesn't fully merge until
just before the emergency vehicle turn-around only slightly north of
said overpass. Accordingly, there are actually four lanes for these
stretches.
What is the correct way to model this?
I'm thinking, for the off ramp, the `highway:motorway_junction` should
be pushed back, the relevant segment made 4-lane, and possibly get
`change:lanes=yes|yes|yes|no`; the location where the ramp splits from
the freeway should be left as-is (currently where the ramp actually
separates from the freeway). For the on ramp, make the relevant segment
4-lane with `change:lanes=yes|yes|not_right|yes`. Is that the sensible
thing to do, or is there another way?
--
Matthew
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