This busy scene provides concrete proof of Amtrak's ongoing tie replacement project on the Northeast Corridor in New Jersey. NS 3031 and 3029 are tied down on the out-of-service track 4 with a loaded tie train behind a Pettibone crane. Passing the work area at speed, with horn blaring, is Amtrak 937 on a Northeast Regional train to Washington, DC. Several NS GP40-2s are leased for the maintenance season, and as ex-Conrail units, they are equipped with the necessary cab signals and equipment to operate on the NEC.