NB Southern Railway MOW 3This page features some NB Southern Railway MOW (maintenance of way) equipment used to maintain the track and roadbed.3 An NB Southern crane, in McAdam. Or is the Petitbone Speedswing below, repainted? A closer look at the Petitbone Speedswing, NBSR 1510.14. One of the two carts attached to 1510.14. This one is carrying a tie.NB Southern Railway | Home