Besides Bertie, the Sodor Roadway Bus Services also owns a few other red buses that were seen around the Island of Sodor, used to carry and transport passengers. These buses are almost identical to Bertie, except they are faceless.
In the Railway Series, various other buses have appeared in multiple colours such as green and blue. In Henry the Green Engine, a blue double-decker bus with a sign advertising the book Troublesome Engines can be seen in the background.
In the magazines, a green bus resembling a faceless Bertie, used for hospital services, appears in the story Important Passengers. In the annual story, Bertie the Snow Bus a faceless blue bus resembling Algy appears with the headcode "401".
The buses are based on the AEC Regal T Class London Country Area buses.
The buses are painted in the famous red bus livery used by London Transport, with silver hubcaps, like Bertie. Other buses featured in the Railway Series, annual stories and magazine stories are painted in various colours such as blue, green and yellow.