Stephen Farrow wrote:

Rubber tyres don't necessarily make it a bus. How about Metro line 1
in Paris? Those
trains have rubber tyres.

As do all four lines of the Montreal metro.

Can't remember what the Paris metro is like but the Montreal one has a
bouncy unpleasent ride from what i remember. Not sure what the
advantage
the rubber tyres is (better on gradients?) but comfort doesnt' seem to
be one of them.

B2003