JeanetteIsabelle, how large is this hypothetical bomb at DFW? Large enough to scare your bus driver (into abandoning his bus and probably his job), but is there some sort of radiological or other risk from the explosion? Most bomb blasts have a perimeter, even a dirty bomb is relatively low risk (low lethality) anywhere except in direct exposure to a plume of radioactive material. It sounds like your driver panicked, but does your scenario require that you do so too?

Get on the radio to dispatch, tell them where you are, and that passengers are on the bus awaiting assistance (getting home on their regular routes). In most circumstances, I would expect a new driver to be dispatched and at your location within a half hour. Its not sexy or exciting, but are we talking 99% of scenarios, or the 1% EOTWAWKI?

I do agree, almost anyone can drive a bus (in a mostly straight line), the question is whether you really need to - without more details, it sounds like you're compounding the bad decision by the ex-bus driver with one of your own. Theft, inexperienced driver, good samaritin, whatever you call it - you've converted the bus into a bug out vehicle, and its not your own.