As the nation marks the 70th anniversary of the Interstate Highway System on June 29, transportation and construction industry organizations are using the milestone to call on Congress to pass a new multi-year surface transportation reauthorization before current federal programs expire Sept. 30, 2026.
The Transportation Construction Coalition (TCC) and the National Stone, Sand & Gravel Association (NSSGA) both issued statements recognizing the anniversary while emphasizing the importance of continued federal investment to maintain and modernize the nation’s interstate network.
The Interstate Highway System spans nearly 49,000 miles and remains a critical component of the nation’s transportation infrastructure, supporting the movement of people and freight across the country. According to the TCC, continued investment is necessary as the system ages and transportation demands continue to increase.
“From supporting supply chains to connecting communities, America’s Interstate Highway System has powered economic growth and opportunity in every region of the country for decades,” the coalition said. “As this system ages and demand continues to grow, sustained federal investment through a new surface transportation reauthorization is essential to ensure it remains safe, reliable, and efficient for the millions of Americans who depend on it every day.”
The coalition noted that the current federal surface transportation authorization expires Sept. 30, 2026, and said a long-term bill would provide states and local communities with the certainty needed to plan and deliver infrastructure projects.
“Congress must pass the next surface transportation reauthorization and reinforce the federal commitment that created the interstate system by investing in key initiatives such as major bridge improvements, freight movement projects, and road and workzone safety programs,” the coalition continued. “Advancing a new surface transportation reauthorization bill by September 30 will support continued economic growth for communities nationwide and keep America moving.”
The TCC also highlighted several interstate corridors as examples of how continued federal investment supports mobility, freight movement and economic growth. Among them are Interstate 10 along the Gulf Coast, including the Calcasieu River Bridge; Interstate 70, a major east-west freight corridor connecting the Rocky Mountains and the Midwest; and Interstate 90 in New York, including the Castleton-on-Hudson Bridge.
NSSGA President and CEO Michele Stanley also reflected on the significance of the anniversary and the role aggregates producers continue to play in building and maintaining the nation’s highways.
“Today marks the 70th anniversary of the Interstate Highway System and the passage of the National Interstate and Defense Highways Act, which was signed into law by President Dwight D. Eisenhower. This historic investment in our nation’s highways transformed our country, connected communities and powered commerce, laying the foundation for the prosperous nation we are today. NSSGA members proudly play an essential role in building and maintaining over 47,000 miles of interstate by supplying the 38,000 tons of aggregates material required to construct every mile of four-lane highway. Their work helps ensure safe, durable roads that support the nation’s transportation and economic needs.
“Now we must look to the future to modernize and strengthen this system. This milestone anniversary, along with America’s 250th Birthday, serves as a reminder of the critical need to pass a multi-year surface transportation reauthorization bill this year. We urge the House of Representatives to consider and pass the BUILD America 250 Act, and the Senate to also take up legislation, to secure the future of our interstate legacy.”
Both organizations pointed to the Interstate System’s legacy as a foundation for economic growth while stressing that continued federal investment will be essential to preserve and strengthen the network for future generations.