Answer: Highways
Explanation:
World War II and the period after saw an unprecedented rise in the economics of the United States and this was driven by significant government spending in infrastructure.
One such infrastructure was roads and highways. The U.S. government embarked on spirited road construction projects that connected so many places in the U.S. including Washington suburbs to other areas. This allowed people to get houses there knowing that they had easy access to their work places and other parts of the country.
