Stuck Behind a Train

Riding home from work, I almost went back and over the James Street Viaduct or the Forester Viaduct when I saw this train park on the tracks where I meant to cross. But this tag was too enticing.

I set up my tripod, shot a few exposures, varying shutter speed, aperture, etc., and then right when I was running out of shots to try, the train started moving. To my shame, it turned out to have a huge arsenal of tags on it, but with the train moving and in such low light I knew better than to try capturing it.