Home Rails.
NJ Transit GP40PH-2 no. 4109 (EMD, 1968) is seen leading Raritan Valley Line train 5431 west across the Middle Brook, bound for Raritan. This part of the line is home rails for the locomotive, which was built for the Central Railroad of New Jersey in 1968, as it is part of the former CNJ Main Line from Jersey City to points west and southwest.