The alarming trend of 'carspreading' - where new vehicles are becoming steadily larger in size - is set to have devastating consequences on UK roads. According to an analysis by Transport & Environment (T&E), if the current pace of growth continues until 2040, it could lead to a staggering 2,600 extra road user fatalities annually.
Since 2000, new vehicles have grown by 1.2cm in length, 0.5cm in height, and 0.5cm in width each year, despite the decline in average family sizes. This relentless expansion has prompted concerns among experts about its long-term impact on public safety, urban space, and environmental sustainability.
The T&E report modelled two scenarios: one where vehicle sizes continue to grow at this rate until 2040, and another where they 'right-size' to 2015 levels. The findings suggest that under current trends, an additional 2,600 individuals - including 79 children - could die in crashes each year by 2040 compared to the right-sizing alternative.
The increasing dimensions of cars are also exacerbating the urban parking crisis. Cities stand to lose between 8.5% and 14% of their on-street parking spaces by 2040, with London and Berlin projected to lose around 100,000 parking spaces each. This will only add to drivers' frustration and congestion.
The environmental implications are equally concerning, with the T&E report indicating that the extra resources required to power these supersized cars would equate to an additional 100 million barrels of oil imports and 22.5 terawatt hours of electricity annually. Transport researcher Brian Caulfield noted that larger vehicles demand more energy, regardless of whether they are fossil-fuelled or electric.
Existing research backs up the report's projections on increased fatalities. A Belgian study found a 27% increase in risk of death for vulnerable road users with a 10cm increase in bonnet height, while US research showed an 81% increase in child fatalities due to such size increases. Hannah Budnitz, a researcher at the University of Oxford, commented that larger vehicles are not only more dangerous but also consume more resources during manufacturing and operation.
To mitigate these issues, Transport & Environment is calling for vehicle manufacturers to reassess their designs and prioritise safety, sustainability, and efficiency. The organisation is urging policymakers to implement stricter regulations to limit the growth of new cars' dimensions and promote 'right-sizing' in the industry.