A Rahway motorist and his passenger escaped a harrowing incident unscathed Sunday morning when another driver fired two shots at their vehicle in an apparent road-rage incident, authorities said. The 27-year-old Rahway man told police a white Dodge Durango was driving behind his BMW 335 in traffic on Truck Route 1&9 south near Communipaw Avenue in Jersey City at 9:30 a.m. when the Durango driver flashed his high beams repeatedly and then struck the victim’s BMW from behind, Kearny police Capt. Tim Wagner said. The Rahawy man continued into Kearny when his vehicle was cut off by the Durango on …