This Single Photo of a Packed Trolley Illustrates the Ups and Downs of US Public Transit - Streetsblog USA
Briefly

The decline of public transit since the 1940s in U.S. cities reflects a shift in consumer preferences post-World War II, favoring automobiles over mass transit.
During WWII, public transit was vital for commuting, with fare prices low, particularly benefiting Black Americans who used it for social mobility during the Great Migration.
Post-war policies favored white commuters with access to mortgages and highways, while systemic inequalities kept Black Americans in urban decline without transit opportunities.
By the 1960s, the demographic shift left public transit underfunded and politically sidelined as white riders moved to suburban areas, neglecting urban transit needs.
Read at Streetsblog
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