The Conrail Lehigh Line is a railroad line in New Jersey that is part of Conrail Shared Assets Operations under the North Jersey Shared Assets Area division. The line runs from CP Port Reading Junction in Manville to Oak Island Yard in Newark. The line is double-track and signaled through its entire length. The line began operations in 1999 using former existing tracks from Manville to Newark that was once part of the original Lehigh Line which is still in existence and is owned and operated by Norfolk Southern Railway.

Manville is a borough in Somerset County, in the U.S. state of New Jersey. The borough is located in the heart of the Raritan Valley region and is a part of the New York metropolitan area. As of the 2020 United States census, the borough's population was 10,953, an increase of 609 (+5.9%) from the 2010 census count of 10,344, which in turn reflected an increase of one person from the 10,343 counted in the 2000 census. Manville was named after the Johns-Manville Corporation, which maintained a large manufacturing facility in the borough for decades.