Metrolink's busiest line is the San Bernardino Line, connecting San Bernardino with downtown Los Angeles and roughly 60 miles in length. On weekdays, this line sees 38 trains per day (19 each westbound and eastbound). On April 22, 2019, Metrolink train 306 sits at Los Angeles Union Station at 9:40 am, awaiting its 10:19 departure time. Power for this four-car train is F125 917, built by EMD in February 2017.
