A typical bus of the 1930s
Sumay was Guam's second largest town well before the 1930s. It was also an important town, with its port, Marine barracks, cable station, Pan Am Clipper landing, hotel and many businesses.
Because of all this importance, it isn't surprising that there was a lot of traffic between Hagåtña and Sumay and the need for public transportation going between them.
One such line was the City Motorbus Line, which ran a bus in the 1930s from the capital to Sumay and back, passing through Piti and Hågat.