What does PKWY mean on an oversize permit?

Parkway. A parkway. Some parkways ban trucks entirely: check your permit names it.

Also printed as PARKWAY.

On real permits

PrintedMeansState
ParkwayOne of Kentucky's parkways; KYTC groups interstates and parkways as the main self-issue permit routesKentucky
Garden State ParkwayToll road run by the New Jersey Turnpike Authority. NJDOT does not issue permits for it.New Jersey

Decode a whole route line