Thread:Comments:State-run bus crashes in Cuba en route to Havana, killing seven/wrong picture description?/reply

I think we're quite safe calling it a bus. The terminology of "coach" as distinct from "bus" isn't a general-English thing, and I'm not even finding an evident footprint for regional use of "coach" in a way that excludes "bus". The relevant en.wikt definition of bus is
 * 1. (automotive) A motor vehicle for transporting large numbers of people along roads.

and of coach,
 * 4. (Britain, Australia) A single-decked long-distance, or privately hired, bus.

There's an en.wp article coach (bus), which starts
 * A coach (also motor coach) is a type of bus used for conveying passengers. In contrast to transit buses that typically are used within a single metropolitan region, coaches are used for longer-distance bus service.

I doubt the common currency of that coach-versus-transite-bus terminology, as it sounds industry-internal, but even if one were to take it as gospel it would still make a coach a kind of bus, just not a transit bus.