Most of the fleet were small open-top double-deckers.
In the unpressurized open-top design the double wall acts as a gas generator, transferring heat from the flame to the fuel.
Smaller midibuses have a lower capacity and open-top buses are typically used for leisure purposes.
The first cars were open-top unvestibuled four-wheelers (phase one).
Improvements to construction techniques (including modular, open-top assembly) decrease construction costs.
These tramcars were replaced by open-top double-deck tramcars from 1912 onwards.
These are often open-top buses, but can also be by regular bus or coach.
This was a partial replacement to the old route 12 service, although it was run with single-deck buses and not open-top double-deckers.
