Speed Limit Fixes

This map mod is a temporary fix for the 'random' speed limit changes (I don't know if I have found all of them). 
I have also done a "sort of" fix to the stop light issue on Highway 80 at Reno. I haven't changed the prefab I just removed the lights and changed the speed limits. Traffic may still stop to make a turn.
I have also fixed the traffic problem on the Winnemucca bridge and I have added several stop lights in some towns so you are not stuck in traffic forever.