Hitech I stopped at psaving the 5th bridge since it covered two types of bridges and is probably global to all the bridges on the terrain.
Here are the bridge types I used.
bridge0a
bridge1a
bridge1b
bridge2a
Here are the 5 psave locations, I drove onto the bridge and fell through, then psaved.
-269313,35,-264126,0.0,2.2,-4.4
-350051,30,-229275,-0.4,-14.0,-2.4
-44571,35,-218933,-0.1,1.7,-96.5
-43769,31,-288907,0.2,-18.1,-118.3
-43727,30,-288941,0.5,-6.0,-120.9
You asked for a few of the sectors some bridges were in.
7,8
8,8
9,8
8,7
9,7