NJ CRASH HIGHLIGHTS DELAYS IN RAILWAY ANTI-COLLISION SYSTEM
A deadly commuter train crash in Hoboken station in New Jersey renews focus on a mandatory anti-collision system that has been plagued with lengthy, contentious delays.Officials said train operator New Jersey Transit has not installed the positive train control (PTC) system in Hoboken or anywhere else on its network.PTC works by hitting the brakes on a train if the engineer misses a signal to halt - the equivalent of running a red light. How long it takes a train to stop depends on its weight. Freight trains can take up to 2 miles to stop.