I only visit the Bay Area about once a year. In reviewing my pictures of last years's visit I have noticed that the only place I see freight on the Caltrains route is in the vicinity of South San Francisco and Santa Clara. What I'd like to know is how the freight gets into South SF. I never see anything on the line anywhere else so how and when does freight move on that line. Can you get daytime shots of UP on that line ? I know the Newark bridge is out of service so I guess it has to come north from Sanata Clara but I never see it. Does this stuff move only at night ?