The quick-paced television commercials for the infrastructure bond measures make promises that voters can't count on. Proponents of Propositions 1A, 1B, 1C, 1D and 1E are running 11 versions of the same ad, which feature different lists of transportation projects based on the region in which the commercials air. In the Bay Area ad, the announcer promises the bond measures will "expand the Caldecott Tunnel, improve 101 and 880, and extend BART and Caltrain." But representatives of Bay Area transportation agencies say that isn't necessarily how they'll spend the money. Projects meeting those broad descriptions are among the Bay Area's...