As the availability and popularity of automobiles increased, ridership in trolleys decreased. See #72 of “100 Leading Facts”, from the time of the State’s Centennial in 1920. It shows the rise in the number of cars and trucks on roads in Maine between 1913 and 1919. It also shows the cost to register your car in Maine 100 years ago. (I’d like to imagine registering my car for $15, although in 1920, that was a pretty penny).
72. Registration fees for automobiles:
15 horsepower $5.00; 35 horsepower $10.00; over 35 horsepower $15.00.
In 1913 we had but 7,743 automobiles, while in 1919 we had 47,188 and 5,790 trucks.
State Superintendent of Schools, “One Hundred Years of Statehood: Centennial Studies Celebrations in the Public Schools of Maine, 1920” (1920). Maine Bicentennial.4. https://digitalcommons.library.umaine.edu/mainebicentennial/4
Banner image of trolleys in Portland’s Riverton Park courtesy of Special Collections, Raymond H. Fogler Library, DigitalCommons@UMaine, https://digitalcommons.library.umaine.edu/spec_photos/1555