 This upgrade would install signals, track circuits and automatic speed control (ASC).However, in a 2017 amendment of the capital program, the agency postponed the construction of the new signal system, only including $2 million to fund design.After positive train control was activated on the easternmost portion of the Montauk Branch in November 2017, the Greenport Branch became the only portion of the LIRR that lacked positive train control.