They don't read the signs so they know where to cross. Really have no idea but we in my county have to go collect the deer after they get reported as our neighboring counties contract that out. For this I don't get paid enough to do it.Whats up with PA and road kill ? 76 and 78 arent too bad but the last time I was on 80 it seemed like there was something dead every 1/4 mile. LOL