I saw 2 this past weekend down at camp. One was half way across Route 7 and the other one was crossing a back road. That one was lucky that I was able to do evasive maneuvers even though I was trucking along with a trailer on the back.
I have stopped numerous times throughout the years to pick up turtles off the road,snappers included. One thing I was told is that you should always take them to the other side of the road that they are facing. They are going that way for a reason, probably to lay eggs.