With a population of 39,128,162, California is the world’s fifth-largest economy with a Gross Domestic Product (GDP) of $4 trillion in goods and services per year. That’s a lot of commerce taking place throughout the State, with a tremendous amount of goods being transported over the state’s roadways – The California State Highway System (SHS). In fact, California’s economy depends on the efficient movement of goods. As the nation’s largest gateway for international trade and a global hub for agriculture, technology, and manufacturing, California must maintain and improve the highway infrastructure that supports this economic engine. Central to that mission are the Critical Highway Freight Corridors (CHFCs)—strategic roadways that carry the bulk of the state’s freight traffic and connect ports, intermodal facilities, warehouses, and distribution centers to national and international markets.
To keep goods flowing safely and efficiently, sustained investment in the pavements that comprise these corridors is essential.
The SHS includes 49,672 lane miles of pavement, but only 13% or 3,771.9 miles of that system carries significant heavy freight traffic. The California Freight Mobility Plan has designated those 3,771.9 miles as the National Highway Freight Network in California. The pavements on these corridors—including segments of I-5, I-10, I-15, SR-99, and I-580—experience some of the heaviest truck volumes in the country. These trucks exert substantial stress on pavement structures, accelerating deterioration and increasing the need for timely maintenance and rehabilitation. Without adequate investment, these pavements quickly degrade, resulting in potholes, cracking, roughness, and uneven surfaces that compromise safety and reduce travel speeds—leading to crashes, emergency repairs, workzone risks, higher shipping costs, lost productivity, and increased emissions.
California’s Critical Freight Corridors, as named by The California Freight Mobility Plan, identified the roadways within the network. The Plan was published in 2023 under the aegis of Gavin Newson, Governor of the State of California, Toks Omishakin, Secretary of the California State Transportation Agency, Elissa K. Konove, Acting Division Director of the FHWA, and Tony Tavares, Director of Caltrans.
These roadways have all served the State of California well over the decades since they were constructed, but a significant number of them are nearing the end of their projected service life and need rehabilitation. Many of the concrete pavement highways in the network were built in the 1970s and ‘80s with 20-year design lives and have far exceeded their expected lifespans. Divisive action is urgently needed to secure adequate funding for the extensive pavement work needed to keep California’s Critical Freight Corridors healthy before they begin to negatively affect the commerce and safety of the State.
Here’s the assessment of the National Highway Freight Network in California, taken directly from the State of California’s Freight Mobility Plan:
Although Caltrans has designated the Strategic Interregional Corridors for funding priority, funding has not kept pace with the costs of meeting growth demands and improving system performance and safety; the estimated cost to improve selected locations on this highway system in most of the 11 Strategic Interregional Corridors is in excess of $10 billion.
Trucking is the most commonly used mode for California’s freight transportation and trucks transport almost all freight and services during some point within the supply chain. For this reason, the trucking industry is one of California’s most valuable freight assets, particularly for the “first and last mile” of a trip. California must continue to develop, maintain, and operate a safe, efficient, and reliable freight transportation network to accommodate the truck volumes necessary to move freight within the state.
Infrastructure Assessment
Poor pavement and bridge conditions negatively affect truck operations. Infrastructure deterioration results in potential safety concerns, increased truck operating costs due to slower speeds, increased wear and tear on trucks, and damage to fragile goods. Poor condition of pavement and bridges also may result in weight restrictions that limit access for trucks.
Trucks contribute to pavement and bridge structural deficiencies, which affect the ability of those bridges to carry heavy loads. High volume truck corridors have a higher potential for rapid infrastructure deterioration, and therefore higher preservation costs.
Sustained pavement investment ensures these critical routes remain in a state of good repair, minimizing costly emergency fixes and extending pavement life through planned, preventive maintenance and strategic rehabilitation. Long-life pavement designs—such as Continuously Reinforced Concrete Pavement (CRCP) and Jointed Plain Concrete Pavement (JPCP)—offer a durable solution capable of withstanding high truck volumes with minimal maintenance over decades. This not only reduces life-cycle costs but also decreases the frequency of work zones, which disrupt freight operations and compromise safety.
Moreover, well-maintained freight corridors are crucial for economic resilience. The reliability of these routes directly impacts supply chain performance and the competitiveness of California’s industries. When freight carriers can depend on consistent travel times and pavement conditions, they can better plan routes, reduce fuel consumption, and avoid costly delays.
Pavement investment also supports environmental and equity goals. Smoother pavements lead to lower vehicle emissions and better fuel economy. Reducing the number and duration of work zones minimizes exposure to construction-related air pollutants in nearby communities—many of which are disadvantaged and already burdened by freight-related impacts.
Federal and state funding programs, such as the Trade Corridor Enhancement Program (TCEP), are vital in delivering these investments. However, long-term performance depends on consistent, multi-year pavement funding commitments that enable Caltrans and local agencies to plan and deliver high-quality pavements—not just quick fixes.
In an upcoming issue of Innovation Highway, we’ll look at strategic plans on how to meet Caltrans’ goals and ensure that California’s Critical Freight Network remains healthy for the next 50 years and more.