 Twin Lakes Road, a quadrant route, terminates at Route 434 before crossing the Delaware River and becoming New York State Route 55 and Sullivan County Route 11 at the border.In 1928, what is now Pennsylvania Route 590 between Lackawaxen and present-day PA 434 in Greeley was designated Pennsylvania Route 37.From Greeley, PA 37 continued south along the PA 434 alignment to its southern terminus at U.S. Route 6.