A Blue Line trolley travels toward downtown San Diego, June 1, 2021.
Issac Diaz, right, and his brother, Ulisses Diaz, look out the window of a Blue Line trolley en route to San Ysidro, June 1, 2021.
Riders exit a Blue Line trolley at the San Ysidro Transit Center, June 17, 2021.
Travelers cross Rail Court toward the San Ysidro Transit Center and the Port of Entry, May 27, 2021.
Michelle Arenas waits with her three children for a shuttle bus to Las Vegas at the San Ysidro Transit Center, June 6, 2020. The family began their day of travel in Michoacán, where they were attending a wedding.
A conductor drives a Blue Line trolley toward San Ysidro, June 1, 2021.
Passengers ride the Blue Line toward downtown San Diego, May 20, 2021.
Christopher Olvera waits with his two younger sisters for a ride at the San Ysidro Transit Center, June 14, 2021.
Pedestrians are seen outside the window of a Blue Line trolley as it approaches the San Ysidro Transit Center, June 1, 2021.
The tracks of the Blue Line are seen from inside a trolley heading toward downtown San Diego, June 1, 2021
Emmanuel Alvarado waits for an Uber driver to arrive at the San Ysidro Transit Center, June 3, 2021. He was traveling from Tijuana to attend his girlfriend’s high school graduation.
Eloisa Nuño sits on a bench at the San Ysidro Transit Center, June 17, 2021.
A man runs across the trolley tracks at the San Ysidro Transit Center, June 25, 2021.