67 Pa. Code § 191.2
Words and terms used in this chapter, shall have the same meanings as they have in 75 Pa.C.S. (relating to Vehicle Code), except the following words and terms shall have the meanings indicated:
Local authorities-State agencies other than the Department, and county, municipal, and other boards or bodies having authority to enact restrictions relating to traffic; the term shall include colleges, universities, public or private schools, and public or historical parks.
Over-posted-size vehicle or combination-A vehicle or combination including its load with a physical dimension-such as length, width, height, turning radius, or vehicle underclearance-in excess or in violation of a posted bridge size restriction.
Over-posted-weight vehicle or combination-A vehicle or combination having a gross weight in excess of a posted bridge weight limit.
Posted bridge-A bridge which has signs erected in accordance with 75 Pa.C.S. § 4902 (relating to restrictions on use of highways and bridges), indicating the maximum weight or size of vehicles or combinations that are permitted on or under the bridge.
Posting authority-The Department as to bridges on State-designated highways and local authorities as to all other posted bridges.
67 Pa. Code § 191.2