On 19 Mar, 09:37, "Boltar" wrote:
Outside of a Harry Potter film , have triple deckers ever been used in
the UK (or anywhere else for that matter)? Is there any technical
reason other than height why they couldn't be used - centre of gravity
or passenger evacuation for example?

B2003

Height, width, weight and pasenger evacuation. It is perfectly
possible to build a gigantic coach, but to be a stable triple-decker
it would need to be a lot wider than usual (too wide for UK roads as
well as too high). It might also be likely to exceed the max.
permissable weight for UK roads.

Jon G