I really worry about using that, unless the data base is updated daily. A lot of roads around my area have been repaved, adding anywhere from 2 to 8 inches of thickness to the road.That will close the gap between the deck and bridge. Recently, there was a wreck because of that. The bridge height placard hasn't been replaced in over 40 years. The road had be repaved three times with a higher crown. When measured at the crown the road went from the original 14'6" to now 11'8". I don't know who is responsible for checking and insuring bridge clearances, but I'd like to see clearance signs at one and two mile markers before the exit. Updated regularly. The guys that haul over size would be grateful.