The bridges do not cross over a water tile, i just made the land mass impossible to traverse around it about a 3K drop
.
Btw you need to -1 to the bridge height to allows gvs tocross on it.
So either side you have a height of 500 feet, you put the bridge at 499 feet instead this gives the gv alittle bounce when getting onto the bridge.
The only draw back at doing this is, you need about 10mph to get onto the bridge to bounce onto to say. But getting off is very easy, just getting on is the hard part were you need alittle speed.
Though i thought about this hard and long the advantages really overweigh the disadvantages.
Btw if you want to make it soo they can cross over water for example, just use the snow tile -retuexture it with water texture and just make the bridge location were even if you go down to the water if the bridge is destoryed getting to the other landmass is usless because of the slop.