High Quality Content by WIKIPEDIA articles! Pennsylvania Route 546 (designated by the Pennsylvania Department of Transportation as State Route 0546) is an 3.51-mile (5.65 km) long state highway in the northernmost regions of McKean County, Pennsylvania. The route, known locally as Oil Valley Road, begins at an intersection with Pennsylvania Route 346 in the community of Duke Center (located in Otto Township). The highway heads northward, through mountainous regions before crossing the state line and into New York, where it continues as Cattaraugus County Route 45 to New York State Route 16.