Passengers on the MBTA’s notoriously unpredictable Green Line will soon get real-time updates on the arrival times of coming trains (or not-coming trains, as the case may be).

In an email statement today, MBTA spokesman Joe Pesaturo confirmed that “tracking equipment is being installed on the trolleys and in the tunnels.”

“The MBTA’s goal is to begin introducing the tracking technology on the Green Line by the end of the year,” Pesaturo said.

The news was first reported today by Boston Magazine’s Steve Annear. The system will track the locations of trains and route that information to passengers using mobile apps, according to that report.

The move will bring Green Line passengers up to speed (well, not literally) with the passengers on all of the other MBTA subway lines; the Red, Orange, and Blue lines have offered real-time tracking since 2010.