To make matters worse, the 1952 rollover legislation actually curtailed the ability of urban projects to qualify for federal aid. In these circumstances, just as before World War II, the states responded by borrowing for streets, roads and highways. Between 1952 and 1955, the total amount of such debt exploded, from $5.8 billion in 1952 to $10.1 billion by the end of 1955 (about $75 billion in today dollars).
Any road warriors want to talk about free markets still? I could go on all year with this stuff. 20th Century Sprawl