Are There Any Gaps in the U.S. Interstate Highway System?

Despite the vast network of interstates that have enabled efficient transportation across the United States, there are still gaps and missing links within the system that have not been fully addressed. These gaps can lead to increased traffic congestion and less efficient travel, both of which can hinder regional economic growth and overall mobility.

Current Missing Links

The U.S. Interstate Highway System, while extensive, is not without its flaws. At several key interchanges, drivers must navigate surface streets with at-grade intersections and traffic signals to transition between interstates. These temporary detours can significantly disrupt travel plans and reduce the system's efficiency.

Examples of Current Gaps

The Bedford interchange to transition between the Pennsylvania Turnpike (I-70/I-76) and I-99 requires drivers to briefly travel on US 220 Business.

The Breezewood interchange, which connects the Turnpike to I-70, necessitates a detour on US 30.

The Carlisle interchange, which facilitates movement between the Turnpike and I-81, involves a short route on US 11.

Fortunately, some of these gaps have been addressed, such as the recent construction of the direct interchange between the Pennsylvania Turnpike (I-276) and I-95 near Bristol, Pennsylvania. This closure has also made I-95 continuous from Maine to Florida, fulfilling its planned route.

Proposed Additions to the Interstate Network

In addition to addressing existing gaps, there are calls for new corridors to be constructed. One such proposed addition is the completion of the planned I-73/I-74 corridors, which would extend through Virginia, West Virginia, Ohio, and Michigan to South Carolina. These additions are particularly critical for enhancing economic development in Southern West Virginia, an area that has historically lagged behind in such infrastructure development.

National Considerations

North Carolina has been actively working on its pieces of these corridors but Virginia, the central state, has seemingly fallen behind, having canceled any further active planning for the I-73 route.

West Virginia has limited planning for non-interstate grade expressways through its section of the I-73/I-74 corridor, which is part of the Appalachian Regional Corridor Highway System. However, progress on these projects has been slow.

Future Vision and Recommendations

The future of the U.S. Interstate Highway System should not only focus on closing existing gaps but also on enhancing the overall travel experience. This includes implementing true bypasses for major metropolitan areas to ensure seamless travel without the need to navigate rush hour traffic. The concept of bypasses is well-demonstrated by the Italian Autostrada, which bypasses Rome, and the current bypasses on the Pennsylvania and Ohio Turnpikes.

Improving interchange spacing is another key recommendation. Interchange spacing should be at least 10 miles apart to maintain the system's efficiency and mobility. This spacing is necessary to minimize the disruptions caused by frequent interchanges, which can turn into points of congestion.

Additionally, the integration of service plazas on freeways is a critical aspect of future infrastructure development. Freeways should offer convenient stops where drivers can refuel and rest, reducing the need to exit the highway for these essential services. This not only improves the travel experience but also ensures the safety and efficiency of the overall system.

Conclusion

The U.S. Interstate Highway System is an invaluable infrastructure network, supplying the means for rapid and efficient transportation across the nation. While the current gaps and missing links pose challenges, future vision and strategic planning can lead to a more extensive and efficient system. Addressing these gaps, enhancing connectivity, and integrating service plazas can improve the travel experience and contribute to the economic growth and development of our nation.