Data mining in a digital map database to identify {HEAD ~ intersections} located at hill bottoms and enabling {TAIL ~ precautionary actions} in a vehicle 
enabling
Data mining in a digital map database to identify { HEAD ~ intersections } located at hill bottoms and enabling { TAIL ~ precautionary actions } in a vehicle
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH