What does TPK mean on an oversize permit?

Turnpike. A toll highway run by its own authority. Many turnpikes need their own permit on top of the state's.

Also printed as TURNPIKE, TPKE.

On real permits

PrintedMeansState
FLORIDA'S TURNPIKE NORTHFlorida's Turnpike, heading northFlorida
Maine TurnpikeThe toll road run by the Maine Turnpike Authority; it needs its own Turnpike permitMaine
New Jersey TurnpikeToll road run by the New Jersey Turnpike Authority. NJDOT does not issue permits for it.New Jersey
Pennsylvania TurnpikeNot covered by a PennDOT permit unless the law allows it. The Turnpike has its own approvals.Pennsylvania
West Virginia TurnpikeThe toll road (I-77/I-64), which has its own oversize travel scheduleWest Virginia

Decode a whole route line