Below ground level highways

[radikaltekno 0]

Hello all fellow pilotsHere in Montreal we have an important stretch of highway which spans over about 4 miles, the Decarie Highway. This is particular in the sense that it is below level land. Basically they dug right down and put it below. It is not covered (tunnel) Decarie blvd which runs parallel to it on both sides (like a service road) is on ground level. Going from one side to the other, the overpasses stay flat as the highway is below ground level. I would like to do this. How would I go about doing it (FSX or FS9) Do I need to modify the mesh? or a poly? Please help as this would open doors to all those intersections who go below ground rather than having an overpass.Thanks!MarcMontreal

[Guest MarkkuS]

Hi!I'm not an expert on scenery design, but I would first try with a flatten polygon below the road. On the flatten you put the road polygon. But don't expect high detail scenery. If you make the road with vtp-polygons, the resolution is only 4.8m/pixel (FS9).The "correct" solution is to have a high detail mesh, where the road below level land, is visible. But you still have low resolution polygons for the road.One solution to get a higher detail road, is to make them with Gmax as ground polygons. But that's looks impractical for a 4 mile long road. An other solution is to make the road as a taxiway(!) (with AFCAD2 for FS9). But then the whole road will be on the same elevation. With the taxiway solution, you don't need the make a flatten polygon, because when you create the taxiway, you also set a height on it.regards