Deep ruts and cracks are reappearing on Spain’s highways as the summer travel season peaks. The Asociación Española de la Carretera (AEC) says more than 34,000 kilometers of roads need urgent reconstruction after years of insufficient maintenance. Restoring the national and regional networks is estimated to cost €13.491 billion.
On July 28, 2026, the Ministry of Transport presented its Extraordinary Pavement Improvement Plan to regional governments, with a focus on the most critical sections. The latest AEC audit found severe or very severe deterioration across 52% of the evaluated network. Nearly a third must be rebuilt within a year to prevent further decline.
Separate traffic-control measures show how Spain manages heavy-vehicle movements. Notices dated October 18 and 20, 2026, identify restrictions affecting vehicles or combinations with four or more axles. Catalonia’s year-round controls cover vehicles or combinations weighing more than 26 tonnes. These rules govern circulation; pavement damage is assessed through the repeated loading road surfaces endure.
Heavy trucks are often blamed for rapid road wear, but the causes are more complex. Damage depends on vehicle weight, how that weight is distributed across axles and how frequently the same spot is stressed. Engineers assess traffic loading through equivalent axle effects, measuring deterioration from a representative axle load accumulated over time. The impact varies with pavement structure and materials, as well as thickness, climate, drainage and existing condition. Spreading weight over more axles can reduce the load on each; modern road design is intended to accommodate heavy vehicles as part of normal traffic.
Deep ruts, cracks and potholes have appeared on major routes such as the A-6 and A-3, as well as the A-67, forcing drivers to change lanes to avoid the worst sections. The deformations are most pronounced in the right lanes, where trucks concentrate. The effects go beyond discomfort: repeated pothole impacts can damage shock absorbers and tires, along with electronic systems. Repairs can be costly, and drivers may not immediately connect the damage to road conditions.
Billions Needed for Recovery
The AEC’s €13.491 billion figure is not an annual budget. It is the total investment needed to restore state and regional roads to acceptable standards. Of the 101,700 kilometers assessed, nearly 34,000 need work within a year, while another 20,000 have serious damage that should be addressed within four years. The Ministry’s own estimate covers only the State Road Network and puts its backlog at €5.6 billion across 26,500 kilometers. That is just 16% of Spain’s roads, but the network carries over half of all traffic and two-thirds of heavy vehicles. The government plans to invest €1.629 billion between 2027 and 2031, beginning with 5,000 kilometers. Tenders are due to launch later this year.
Why Ruts Form, and Where
Ruts are long depressions that follow the path of wheels. They form as pavement layers deform under repeated heavy loads and are especially common where intense truck traffic meets poor maintenance. Some drivers now avoid the worst-affected right lanes and shift to the center or left, but the problem is localized and does not affect entire highways uniformly. The damage extends beyond appearance: mechanics warn it can cause vibrations and uneven tire wear, as well as mechanical failures.
Surface Repairs Aren’t Enough
Recent work on the A-5 near Madrid shows why resurfacing alone is no lasting fix. The Ministry awarded €15.4 million to rebuild the pavement between kilometers 10 and 36.7, including deep repairs to the sub-base and upper layers. Lane closures and narrowings are scheduled through July and August 2026. Officials acknowledge that annual investment in the state network has reached €1.8 billion, but years of underfunding have left a backlog that now demands much more expensive interventions.
The new government plan aims to replace reactive patching with preventive maintenance, but its first phase will not begin until 2027. Until then, drivers must handle deteriorating roads, while the logistics sector continues to rely on highways that are increasingly showing their age.
Road conditions affect motorists’ comfort and safety, along with their repair costs. Even seemingly minor factors such as footwear can carry legal and financial consequences, as explained in this guide to summer driving rules in Spain.
