I would like to disagree on the freeway-freeway double-trumpet setup at G60 and G1503 where I believe you're asking to disconnect the two freeways' waypoints. This seems to be a not uncommon setup in China where you could (or they did) have a tollbooth between the freeways:
🔗 There are common exceptions to positioning at centerline crossings, such as interchanges where ramps connect nearby, non-intersecting highways, or where a short access road connects a road to another with a trumpet or similar interchange. In these cases, the waypoints for the same interchange on the separate highways cannot be at the same coordinates. Instead, the waypoints should be where the connecting ramps or access road interchange with each highway.
This reads to me the guidance is intended for a trumpet interchange with say a parallel, non-intersecting road, which wouldn't apply here:
- There is a clear centerline crossing between G60 and G1503.
- "The short access road" I think literally refers to a road, not just short merge section.
- The freeways literally go over each other, so they are intersecting, and have waypoints be at the same coordinates.
Perhaps my reading of the guidance is:
🔗 There are common exceptions to positioning at centerline crossings where the waypoints for the same interchange on the separate highways cannot be at the same coordinates, such as interchanges where ramps connect nearby, non-intersecting highways, or where a short access road connects a road to another with a trumpet or similar interchange. Instead, the waypoints should be where the connecting ramps or access road interchange with each highway.
(i.e., if they don't intersect, don't try to draw them as if they do?)
