Are there 1 or 2-day passes? I can't find anything on the 511 website. Ideally, I would like a pass that works both both systems....Is there such a thing? One teenager of two is local and I guess is eligible for an orange pass but she says BART is "very expensive" for her to use. Has anyone sought to purchase a school pass? Do they require proof of enrollment in an eligible school? I would be happy to buy passes for both of them, if there is a short-term pass.TIA!