Why did the United States government spend money to improve both National Highway System and the Interstate Highway system? How did the building of this system affect South Carolina’s economy?

The United States government spent money to improve both the National Highway System and the Interstate Highway System in order to enhance transportation efficiency, safety, and economic growth. The construction of these highways was a response to the increasing demand for efficient and reliable transportation infrastructure as the country's population and economy grew.

The building of the Interstate Highway System had a significant impact on South Carolina's economy. The improved connectivity and accessibility provided by the highways facilitated the movement of goods and people throughout the state, as well as across state lines. This, in turn, helped to boost economic development by opening up new markets and opportunities for businesses in South Carolina.

The highways also played a role in promoting tourism and attracting visitors to the state, further boosting the economy. Additionally, the construction of the highways created jobs and stimulated economic activity through the purchase of materials and services needed for the projects.

Overall, the investment in the National Highway System and the Interstate Highway System had a positive impact on South Carolina's economy by improving transportation infrastructure, increasing economic opportunities, and fostering growth and development in the state.