Until May 2007 the whole fleet consisted of only single decker buses.
Best way to go is by double decker bus.
The O305 was designed for use as a single decker bus.
Treaty had a large following who often came out from the city on double decker buses.
Currently the double decker buses also serve other local routes, and the price is no longer $2.
But a circular tour on top of a double decker bus.
I could see the top deck of a double decker bus coming up the hill behind me.
This door looks like a double decker bus hit it.
Later they lived on a purpose-built double decker bus for some time.
At first the company used only double decker buses.