(WTNH) – Under federal orders, Metro-North has finished upgrading its signal system. Those upgrades mean trains approaching five moveable bridges and two critical curves on the New Haven Line will automatically stop when engineers fail to slow down. According to our partners at the Connecticut Post, the emergency stop provisions were put in place at two curves n February, one in Bridgeport, the other in Port Chester, New York. The upgrades were made at the 5 bridges, all of them in Connecticut, earlier this month. The Federal Railroad Administration issued the order in December after that deadly train de-railment in the Bronx. An investigation found the train was going 82 miles per hour in a 30 mile per hour zone moments before it jumped the tracks. The reprogrammed signals use the railroad’s existing automatic train-control system, which until the federal order had been used to slam on brakes when trains were at risk of collision, but not to enforce speed limits on curves. As part of the federal order, railroad engineers were were ordered to go 30 mph when approaching the curves and bridges until the signal upgrades were finished.