For 10 points, name this form of public transit whose most famous incarnations are the cable cars of San Francisco and, as made famous by a Tennessee Williams play, New Orleans's "Desire" line.
A standardized form of these vehicles were developed in the 1930s under the direction of the Presidents' Conference Committee. Under the guise of National City Lines, a consortium including General Motors and Firestone converted many of these systems to motor buses in the 1950s. Modern versions of these systems are known as light rail. For 10 points, name this form of public transit whose most famous incarnations are the cable cars of San Francisco and, as made famous by a Tennessee Williams play, New Orleans's "Desire" line.
A standardized form of these vehicles were developed in the 1930s under the direction of the Presidents' Conference Committee.
{streetcars} [or {trams} or {trolleys} or {trolleycars} or light {rails} before those terms are read]