in a car, on a plane

[rmoore]

One travels

in a car
in a spacecraft
in a taxi

but

on a bus
on a plane

Is there any logic behind the use of in and on?

Richard.

[Tdol]

I'm not sure of the logic, but it seems to be the case that where you need a ticket, you're on the transport, apart from bikes, etc, where you are physically on.