Answer:
Interstate Highway System
Step-by-step explanation:
The Interstate Highway System is a network of highways created by president Dwight Eisenhower through the Federal Aid Highway Act of 1956. With a length of over 48 thousand miles (77 thousand km), it was at the time the largest road system in the world. The system wasn't completed until 1992, but by that time, it had dramatically altered transportation in the United States, leading to a major increase in passenger and freight traffic, and making commutes from the suburbs to urban centers possible.