Before the rise of automobiles, where new trolley car lines were
built, people, businesses, and neighborhoods followed, and trolleys
quickly helped Chicago become a world-class city.
Chicago's extensive transit system first started in 1859, when horsecars
ran on rails in city streets, cable cars and electric streetcars
following soon after, but once trolleys appeared on the scene, Chicago
metaphorically exploded. At its peak, Chicago had over 3,000 streetcars
and 1,000 miles of track--the largest such system in the world. By the
1930s, there were also streamlined trolleys and trolley buses on rubber
tires. Some parts of Chicago's famous L system also used trolley wire
instead of a third rail. Trolley cars once took people from the Loop to
such faraway places as Aurora, Elgin, Milwaukee, and South Bend. Though
seemingly-outdated in the 21st century, there are still a few trolleys
running today for anyone who prefers to take the scenic route.