On May 16, 1931, the first trolleybus service began in London, England. Trolleybuses, also called streetcars, are powered by electricity transmitted by overhead wires. Many cities in the United States have trolleys, including San Francisco, Philadelphia, and New Orleans. The London trolley fleet, for much of its life the largest system in the world, operated until 1962.
 
Trolleys can be inconvenient because their initial infrastructure is expensive, rails and overhead wires take up space, and the system can pose a danger to cyclists and pedestrians. However, because they run on electricity, trolleys are less expensive to maintain and operate, quieter, and less polluting than buses with gasoline-powered engines. 
electricity
Noun

set of physical phenomena associated with the presence and flow of electric charge.

expensive
Adjective

very costly.

infrastructure
Noun

structures and facilities necessary for the functioning of a society, such as roads.

initial
Adjective

first.

streetcar
Noun

public transportation, usually electric, that runs on rails. Also known as a trolley.

transmit
Verb

to transfer electrical energy in bulk.

More Dates in History

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