America’s roadways have seen better days. In its 2025 report card, the American Society of Civil Engineers (ASCE) gave American road infrastructure a D+. The organization noted that “39% of major roads in the U.S. are in poor or mediocre condition,” and the repair backlog is approaching $700 billion. This month, lawmakers will convene to address these issues and mark up the surface transportation reauthorization bill.
They would be wise to keep in mind that massive trucks wreak havoc on roads, reducing pavement life and making accidents far deadlier. As the National Consumers League, the Taxpayers Protection Alliance, and 25 other organizations made clear in a recent coalition letter to lawmakers, proposals being considered on Capitol Hill would make the problem even worse by putting even larger and heavier trucks on the road. Congress must avoid this policy pothole and embrace commonsense rules of the road.
The overwhelming weight of evidence cautions against allowing heavy trucks on the road. In her comprehensive overview of the data, Purdue engineering scholar Maria Alicia Chung Li concludes, “Overweight truck operations cause significant damage to highway infrastructure that consequently reduces the service life of pavement and bridges. Overweight trucks cause much greater damage to pavement surfaces than the damage expected from legal weight trucks.” Among the more striking studies surveyed by Li was a Texas analysis estimating “that the damage caused by overweight truck traffic … is approximately 20.6 percent greater than the damage caused by the design traffic.” The same study found that “the additional damage caused by overweight trucks reduces pavement service life by 50 percent.”
These results are not surprising: putting too much pressure on even the most durable materials can wear the materials out in short order. A 2009 analysis by researchers at the University of Waterloo “showed that concrete bridge damage is exacerbated when they experience sustained OW [overweight] truck operations because such vehicle loads accelerate the incidence and severity of fatigue cracking, leading to exposure of reinforcements to moisture and subsequent corrosion and cover concrete spalling.”
Because of similar estimates of damage from overweight vehicles, Congress has wisely opted for decades to maintain the maximum cap of 80,000 pounds in Gross Vehicle Weight (GVW) on federal interstates. Some states have bypassed this limit by setting up permitting systems that allow overweight vehicles access to certain designated roads — so long as fees are paid into state coffers. A joint 2024 study by the Indiana Department of Transportation and Purdue University notes, “Indiana and Wisconsin [have] the highest thresholds for extra-legal truck weights (over 200,000 lbs. and 170,000 lbs., respectively). They are followed by Missouri (160,000 lbs.), Iowa (156,000 lbs.), Michigan (150,000 lbs.), Minnesota (145,000 lbs.), and Ohio, Illinois, and Kentucky (120,000 lbs.).”
The idea behind these state-level permitting systems is a tempting one. If hefty vehicles can be economically useful but take a toll on the roads, they should pay extra to compensate for the extra wear and tear. The problem is that these overweight permits are still leading to faster road deterioration even with extra fee revenue. The data clearly shows that more OW permits lead to greater infrastructure damage and required maintenance with taxpayer dollars. The Indiana Department of Transportation and Purdue University conclude, “routes that experience higher cumulative loads see their PCR [Pavement Condition Rating] decrease faster than their counterparts … [OW] routes with higher cumulative loads experience on average approximately 70,000 more ESALs [Equivalent Single Axle Load] than their counterparts and see PCR drops of six points on average … this translates into approximately $3,778/mile in pavement damage cost due to OW operations.”
Congress raising the maximum GVW on federal interstates would make these problems worse. States would almost certainly raise the maximum weights in their OW permitting programs, and taxpayers would pay the price. Meanwhile, old and faltering pavement across the country would be exposed to far more pressure on a daily basis. If America’s roads only earn a D+ now, it is only a matter of time before they fail. Congress must swerve away from proposed weight increases and keep commonsense policies on autopilot.
