WyoTraveler wrote:
It is measured at the fog line. When truckers see the sign and if low they take the center.
Really? Clearance signs show the lowest one, which is actually in the center since all roads are crowned, as a rule of thumb most bridges have a greater clearance at the shoulder. With some what of a margin for error they are usually marked at a bit lower clearance than they are, but as for the OP rest assured that a 13'6" semi probably would not make it as well if he had not went under slow he would have hit. Better than a 13' bridge with an additional 2" of new asphalt.
