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The September 1928 recordings published by the Museum of London include a commentary picking out the brakes of a "motorbus" or the rumble of a "motorcoach", alongside the rattle of horse-drawn carriages.

Despite being quieter and greener than motorbuses, eventually the demand for new routes became too great for the trolleybus and it was fully replaced by its diesel-powered counterpart by 1972.

A federal government agency loaned Seattle $10 million in 1939 to pay off the debt and implement a revised plan to use electric, trackless trolleys and motorbuses instead of streetcars.

SAT Excursion to see holiday lights in fleet of historic trolley and motorbuses; no food or beverages allowed, 7 p.m.

During the 16-day land portion, travelers take in the landscape of the Canadian Rockies from a luxury motorbus and also tour Denali National Park and Preserve in Alaska.