If you see activity during the workweek taking place on the Gold Line's Eastside Extension tracks it's because Metro Rail has begun the process of "grinding the rails." Using a machine that moves at about 2.5 to 3 miles and hour, workers are making their way down the six mile stretch along Third Street in East Los Angeles. They began at Atlantic Boulevard and Pomona Street and will move westbound along Third Street until Indiana Avenue and end up at Lorena and First streets at the East Portal tunnel entrance. more ›