Caltrain's work train, made up of two leased PFMX GP9's, Amtrak and UP rock cars and one of its two leased cabooses crawls along track two between Redwood City and San Carlos, dumping ballast. The shoofly has been cut away -- what you see is the #2 main track connecting to the new elevated #2 track. Track number one was already cut over by this point.

October 1999