Back in 1987, I was working as a corporate trainer at a bank in Oakland, California.  On most days, I would commute from Napa, California, with my husband to Walnut Creek, California. He would drop me off at the BART station, and I would catch the train to Oakland. He worked in Walnut Creek so that he could go on to work. The Train came into Downtown Oakland, about a block away from the bank branch where I was working.  The train came into a station that was down in the bowels of the earth.  There were three layers of escalators to take to reach the street level.