In article .com,
Boltar says...

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?

Maximum height of a vehicle in the UK is 15ft 9in. Above that it's an
abnormal load. Take off the height of two adults standing up and that
leaves you under 4ft to create a third deck, have the
wheels/chassis/drivetrain etc.


--
Conor

Light travels faster than sound. This is why some people appear bright
until you hear them speak.........