Living in the UK, you might have observed a rise in the number of sport utility vehicles (SUVs) and large vehicles on our roads. These vehicles represented 63% of new car sales in the UK last year, a stark increase from just 12% in 2010.

On a global scale, this figure hovers around 48% and shows no signs of decreasing. This trend is concerning, as larger vehicles mean greater risks. My research focuses on the intersection of transportation and health, and recently, I collaborated on a study featured in BMJ. We believe regional, national, and international strategies are essential to limit the sale of these vehicles.

The principal health hazards associated with cars include road risks, pollution, and the tendency for people to choose driving over walking or cycling, which are more beneficial for health. Heavier cars negatively impact all these factors.

Intuitively, the risk of injury from a large vehicle is more pronounced. Their front ends are tall and blunt compared to standard cars; this is problematic for cyclists and pedestrians. Last year, I was involved in a review analyzing studies on the interactions between SUVs and vulnerable road users. The findings indicated that adults struck by SUVs face a 44% higher mortality risk than those hit by standard cars. The review also estimates that in the U.S., about 10% of pedestrian and cyclist casualties could be avoided by substituting SUVs with smaller vehicles—translating to roughly 1,700 preventable deaths or serious injuries annually.

Additionally, cars are becoming wider, a phenomenon dubbed “car spreading.” European new cars now grow, on average, by 0.5 cm each year. With limited road space devoted to cars, there’s increasingly less for cyclists and pedestrians. Encouraging more people to walk or bike would offer significant health benefits. Larger cars not only diminish these advantages but also contribute to urban congestion.

The larger size of these vehicles exacerbates air pollution issues. While the shift toward electric vehicles is promising for reducing emissions, it’s crucial to note that even electric SUVs create particulate pollution from tires and brakes, a major contributor to urban air quality concerns. Heavier vehicles produce more tire and brake wear, meaning electric SUVs may not offer the same air quality benefits as smaller electric cars.

So, what can we do to mitigate the proliferation of these large, hazardous, and polluting SUVs? My colleagues and I propose several strategies. Many cities now implement clean air zones—London’s Ultra Low Emission Zone is one example. While not specifically targeting vehicle size, such zones urge people to consider pollution from older, larger cars. Recently, the Cardiff council decided to charge extra for residential parking permits for SUV owners, joining cities like Paris and several in Germany and France that have raised parking costs for larger vehicles.

Beyond parking fees, governments might rethink car taxes to incentivize smaller vehicle purchases. Imposing higher taxes on heavier cars would align with societal costs related to road danger and pollution.

While some individuals may have legitimate needs for larger vehicles, with SUVs representing nearly half of all new car sales, we must recognize the health risks they pose. For improved road safety and cleaner air, buyers need to weigh these factors and governments must adjust regulations to reflect the dangers and environmental impacts of these vehicles.

Anthony Laverty is a student at Imperial College London School of Public Health.