Heres a road gap from one of the more popular trails here in aus:
http://www.farkin.net/forums/album_pic.php?pic_id=9610
http://www.farkin.net/forums/album_pic.php?pic_id=9636
its an awesome gap... you fully clear the road, and the track continues down the other side.
I did manage to collect a tree on the oposite side one time
wasnt pretty!