I just compiled it and noticed a couple of displacement errors. Several cases of "NODRAW on terrain surface!" and "Found a displacement edge abutting multiple other edges". One of the displacements on the bridge is the cause of that, looks like you've accidentally displaced the whole brush.
There's a couple of other errors in the map, overlays with no assigned faces, unused keyvalues and some I/O problems related to the car alarm, they're easy enough to fix and shouldn't be making it crash.
You're also encasing the whole map in the sky material, which is poor for performance, make the lowest brushes nodraw and wall the sides up with nodraw wherever you can.
Not a bad looking map, must've taken a while with all the forest prop placement.