Definition
Highways vs. mass transit is the postwar American infrastructure choice — to fund the Interstate Highway System and urban expressways rather than passenger rail, subways, and bus rapid transit — that shaped American urban form, racial geography, energy consumption, and political alignment for the rest of the twentieth century.
The choice was made between roughly 1945 and 1970. The Interstate Highway System was authorized in 1956 with $25 billion in federal funding; subway and commuter rail investment over the same period was a small fraction of that figure. By 1970 every major American city was substantially shaped by federally financed highways; almost no major American city had built substantial new mass transit.
Robert Caro's The Power Broker documents the choice as it played out in New York, where Robert Moses had access to enough Triborough Bridge Authority surplus to build either highways or transit — and chose highways.
Why the choice matters
The New York case study
Caro's Point of No Return (Topic 40 in The Power Broker) details the New York case. By 1952 the Triborough Bridge Authority's annual revenue had reached $28.3 million — a 453 percent increase over prewar levels. Accumulated surplus exceeded $700 million by 1955.
What that money could have built:
- Second Avenue Subway. Approximately $300 million in 1955 dollars to build the long-proposed subway under Second Avenue, relieving the chronically overcrowded Lexington Avenue line.
- Trans-Hudson rail tunnel. Approximately $200 million to build a passenger-rail tunnel under the Hudson, relieving the LIRR-PATH bottleneck that continues to strangle New York-New Jersey transit today.
- LIRR modernization. Approximately $150 million to electrify the Long Island Rail Road's diesel branches and add capacity.
Moses chose to spend the surplus on more expressways — the Cross-Bronx, the Brooklyn-Queens, the Long Island Expressway. The transit alternative was real and rejected.
Why American cities chose highways
The choice in American cities was over-determined. Multiple factors aligned to favor highways:
Federal funding match. The 1956 Interstate Highway Act funded urban highway construction at a 90% federal / 10% local match. Mass transit had no equivalent match until 1964 (Urban Mass Transportation Act) and at much lower ratios.
Auto-industry lobbying. General Motors, the highway-construction industry, and the oil industry organized effectively against transit competition. The 1949 American Cities exposé documented the dismantling of streetcar systems in 45 cities (the General Motors streetcar conspiracy).
Operator preferences. Moses preferred highways; equivalent figures in other cities (Edmund Bacon in Philadelphia, Robert Weinberg in Pittsburgh) had varying preferences but on balance favored automobile infrastructure.
Suburban political coalition. Postwar suburbanization aligned the new middle-class voter base with highway-favored politics. Mass transit's political constituency was urban and Black; postwar suburbanization made it electorally weaker.
The path-dependence trap. Once highways were built, suburbs developed; once suburbs developed, transit became less politically viable; once transit was less politically viable, more highways were built. The reinforcing loop locked in the choice.
The European comparison
European cities facing similar postwar reconstruction made systematically different choices. Tokyo, London, Paris, Munich, Stockholm — all invested heavily in transit during the postwar period. By 2000 these cities had transit modal shares of 30-50% of trips while comparable American cities had 5-10%.
The European cities are not poorer; they are not more densely populated than New York; they did not face fundamentally different physical constraints. They made different choices.
The Caro verdict
Caro's verdict in Point of No Return is unusually direct: the postwar highway choice was the single most consequential decision Moses made in his career. The accumulated effects — automobile dependence, suburban sprawl, racial geography, energy consumption — are larger than the slum-clearance displacement, larger than the expressway destruction of specific neighborhoods, larger than the personal corruption.
The choice was, in Caro's framing, a Point of No Return — irreversible at the moment it was made, and increasingly expensive to retrofit with each passing decade.