At the height of the commute Monday morning, the first day of regular service for the new Expo Line, the optimism was quickly tamped down because a drunk driver crashed through a fence and onto the tracks near Western Avenue, blocking trains from running in both directions. An inauspicious start for the Expo Line to be sure, and one that threw a stick in the spokes for a lot of passengers this morning, including our very own Saul Gonzalez, who rode the Expo Line to KCRW’s studios at Santa Monica College.