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The Road Elevation should be changed where one road passes over another. By default, the Elevation of a segment is Ground (zero). When two segments overlap but do not actually connect in the real world, the value of Elevation for each segment must be different. This ensures that the Waze problem detection system doesn't flag the spot where two segments overlap as a location where a junction might be needed. The visual representation of the relative Road Elevation is different when viewed in the Waze Map Editor (WME) and the Client application.
- 1. The Client App displays segment elevation based on the road type only, meaning Freeways are always on top, Major Highways are next, followed by Minor Highways, Ramps next, Primary Streets below all those, and finally Streets are at the bottom. This is the same order seen when setting the road type in the editor.
- 2. The WME uses the Road Elevation setting to display the relative elevation of the road. It displays the road with the highest "elevation" number at the top of the visual stack and works its way down as would be expected.
Note: Although the client application does not benefit from the Road Elevation setting, it is recommended to set the Road Elevation relative to the physical mapping in the real world to enable possible future Client application updates to show the same visual representation as the WME.
- 3. Elevation -5 is used for non-drivable roads to help ensure that the routing engine does not try to connect or route drivers from roads onto non-roads by mistake. It acts to prevent false system reporting that the roads should be connected.
Mid Atlantic Region
No elevation standard for the region or any of the states within
Delaware uses a real elevation method to set road elevations. This method sometimes requires the use of extra segments. This has the benefit of an enhanced look in the Live Map, and, more importantly, makes it easier to close a bridge or tunnel without affecting traffic to nearby homes and businesses.
Freeways are considered to be "Ground Level," except where they cross another freeway. And then that segment is adjusted accordingly. The only other exception to this are the downtown tunnels. Also, do not increase elevation on segments that go over bridges. If there is no other segment going under it, it should be Ground.
In general, all freeways should have an elevation of ground. Roads running over or under the freeways will have an elevation of +1 or -1. Where two freeways cross, the overpass should generally have +1 elevation. More complicated junctions may need more complicated treatment; apply the principal of "freeway defines ground level whenever possible" and keep elevations as sensible as possible. Remember that this region is not very hilly.