Goodbye to 120 km/h? The IEA proposes a new highway limit to save fuel.

In an effort to promote more responsible and efficient energy consumption, the International Energy Agency (IEA) has issued a series of recommendations for citizens, including reducing speeds on European roads and highways.

One of the most notable, and at the same time controversial, measures is the suggestion to reduce speeds on expressways by 10 km/h, setting a limit of 110 km/h on Spanish motorways to achieve significant fuel savings.

According to the IEA, driving at a constant, lower speed not only reduces drivers' fuel bills—with an estimated saving of around €60 per year if driving at 10 km/h slower—but also contributes to a vehicle's energy efficiency.

Reducing the maximum speed limit on highways by 10 km/h could lead to fuel savings. The International Energy Agency (IEA) estimates that approximately 290,000 barrels of oil per day could be saved in the short term. Savings for the end consumer will depend on the mileage traveled. The Traffic Department indicates that going from 90 km/h to 120 km/h increases fuel consumption by up to 30%. However, it should be noted that speed is not the only factor, nor the most determining factor.

Changing the way you drive or properly inspecting your vehicle can make a difference. Simple decarbonization—eliminating carbon deposits from your engine—can reduce polluting emissions by up to 20% and reduce fuel consumption by up to 10%.

Driving steadily between 50 and 90 km/h (31 and 56 mph) can also save fuel. When driving over 80 km/h (50 mph), using the air conditioning is more efficient than opening the windows. Setting the air conditioning 3°C warmer will also immediately improve fuel consumption.

The proposal is part of a set of measures that advocate for smarter driving, such as maintaining correct tire pressure and turning off the engine when the car is stopped.

In addition to driving recommendations, the IEA emphasizes the importance of choosing sustainable alternatives for travel. For short trips, citizens are encouraged to walk or cycle, while for longer distances, the use of public transport is emphasized. These actions, in addition to saving energy and money, help reduce emissions and ease traffic congestion in cities.

The Decalogue explains, for example, that walking or cycling are excellent alternatives to cars for short trips and help us save money, reduce emissions, and reduce traffic jams. Thus, it recommends, if possible, leaving the car at home for short trips, especially if you own a large vehicle.

The IEA encourages carpooling with neighbors, friends, and colleagues to save energy and money, arguing that commuting by bike also provides enormous savings and health benefits. Many governments also offer incentives for purchasing electric bikes.

For longer distances, where walking or cycling is impractical, public transport also helps reduce energy use, traffic jams, and air pollution. The Agency suggests, if you're taking a longer trip, "leave your car at home and use the train, or buy a travel pass to save money over time."

For the Agency, cities should promote Car-Free Sundays and celebrate them frequently: "These Sundays are already a custom in many countries and cities. Brussels, Edinburgh, Milan, and Paris have used them to promote public health, community spaces, and cultural events." According to its estimates, if you live in a large city, leaving your car at home every Sunday could save you €100 a year.

Finally, remember that local businesses or governments may also offer incentives for purchasing transit passes, so we suggest planning your trips in advance to save on fares and find the best route.