Large Cars are a Positional Good
Americans have, over the last generation, gotten ever larger cars, to the point that the market is dominated by crossovers, pickup trucks, and SUVs and barely has sedans. Europe is not far behind, with the sedan market having collapsed and half of new sales comprising SUVs. Considerable resources are spent on these larger cars, which are more expensive to purchase, maintain, and refuel. The benefits at this point, however, are rather positional. The benefit of larger cars at this point is not about the comfort or performance of the car, but about being larger than other road users. Streets for All’s Michael Schneider described it as an arms race; this arms race that wastes resources and produces pollution and greenhouse gas emissions, without benefits even to individuals writ large, precisely the kind of problem that government regulation can solve.
The benefits of larger cars
The usual benefit drivers cite for why they want a larger car is comfort. The increase in car size from (say) the Fiat 500 or the Beetle or the 1970s Civic to modern midsize cars like the Accord and Camry has led to obvious improvements in comfort: four doors rather than two, ample front and rear passenger legroom, more trunk space.
And beyond this point, the relationship between car size and comfort saturates. Luxury sedans are still larger than midsize ones, but not by much; where the 500 had a curb weight of about 500 kg, the modern Accord is 1.4 t and the Camry is 1.6 t, barely less than a C-Class at 1.7 t and not much less than a 2.1 t 7 Series. A family car does not need to be larger than this, and when I talk to people about their vehicle purchases, at least the ones who tell me they’re getting SUVs do not cite comfort, not in the 2010s-20s.
The main selling point of luxury cars is performance. It’s this high-performance segment that Tesla competes with – electric cars have better performance specs, and where the older automakers tried to base their electric car offerings on preexisting platforms (like the Leaf, based on the Tiida), Tesla instead started by building high-performance luxury cars and expanded from there. But here there is no benefit to size – the Model 3 is around 1.7 t curb weight, and that includes batteries, which together weigh nearly half a ton.
Larger cars can also haul more goods, but the SUVs and pickups are expressly designed not to do that. The F-150’s bed has decreased with every new generation of the car; the Kei truck, specialized to have a large bed relative to the rest of the car, looks so weird to Americans that Massachusetts at one point banned it for being unsafe, while Americans on social media mocked the users as trying to prove an environmental point. The minivan, specialized to carry seven to eight passengers, has been unfashionable for at least a generation, losing out to the similarly large but lower-capacity SUV.
Instead, what I do hear from people telling me why they want a big car is purely positional: “I get to see over the other cars,” or alternatively “I can’t be the shortest car on the road because then I can’t see anything.” People are also recorded modifying their cars to be taller for the same reasons. The visibility in question does not improve if all cars get bigger; only the relative size matters. In the case of car accidents, this is even worse: in a collision between two cars the larger one is safer for the occupants, but making all the cars larger doesn’t improve traffic safety, and makes it much worse for pedestrians, and there’s some evidence of risk compensation by drivers of larger cars increasing the overall number of crashes.
The discourse on social benefits tends to exclude individual ones; thus, it’s easy to say that something that provides tangible individual benefits (such as larger dwellings) does not provide social ones. But this is something different. A purely private good does not provide positive externalities or improve the usual indicators that are usually the realm of public policy, like public health, but it improves the living standards of the owner, without negative externalities. But here, the benefit of the SUV or pickup truck to the user is purely the arms race on the road; the improvement in the quality of life of the owner is entirely about externalizing a fixed or even rising risk of car crashes to other road users. There isn’t even a social benefit here in the sense of the sum total of private individual benefits.
The costs of larger cars
While larger cars do not improve societal well-being on average, they have high individual and social costs.
The social costs are easier to explain: those cars emit much more pollution and greenhouse gases. The Camry has a fuel economy of maybe 37 miles per gallon (6.35 l/100 km) in the US; the F-150 gets less than half that, around 17.5 mpg (13.4 l/100 km). The fuel consumption ratio, 2.1, is somehow larger than the mass ratio – the F-150 doesn’t weigh 3.4 t but rather not much more than 2 t depending on model. Air pollution emissions are, for modern cars with modern petrol engines, proportional to greenhouse gas emissions; a car with twice the fuel consumption is going to also emit twice the particulate matter.
Then there is the danger of crashes. The United States has seen an increase in traffic fatalities lately, especially for pedestrians. The pedestrian fatality rate, in turn, comes from the form of pickups and larger SUVs: they have larger hoods, which hit pedestrians in the chest or (for children) the head rather than in the legs, and which also reduce visibility. Here it’s not an issue of mass but one of hood shape, but these come from the same fundemantal issue of an arms race to be larger and taller than the other cars, to the exclusion of spending on personal comfort.
Those social costs are not the tradeoff of some individual benefit. There is a benefit to the driver of the larger car, but there is no benefit to the driver of the average car on a road with larger cars. Instead, the driver of said average car incurs significant individual costs, coming from the need to buy, maintain, and refuel a larger machine. The low fuel economy costs the drivers money; most of the costs are external, but not all. The purchase price of a larger car is larger, because it is a larger piece of machinery, requiring more workers and more capital to put together; Edmunds’ price range for the F-150 is 50-100% higher than that for the Accord or Camry. Consumers routinely spend more money for better products, but here the product is not better except positionally.
The way forward
Government regulations to curb the arms race can directly limit or tax the size of cars, or instead go after their negative externalities. The latter should be preferred; in particular, a tax on car size would create a situation in which people can pay for a road that is safer for them and more dangerous for others, which is likely to lead to both much more aggressive driving by the largest cars on the road and to populist demands for large cars for everyone.
Specific taxes on large cars may still be appropriate in specific circumstances, like parking; Paris charges SUVs more for parking, justified by the fact that these vehicles don’t fit in the usual street parking spots, which are designed for the typical European car and not for the largest ones.
But outside the issue of parking, it’s better to be tighter about regulations and taxes on pollution, and about accidents. In the United States, it’s necessary to get rid of the system in which cars are perennially underinsured, with most states requiring liability coverage of $50,000 (Cid’s car accident, which was medium-term disabling but not fatal, incurred around $1 million in bills, and the insurance value of human life in the United States is $7.5 million). On both sides of the Atlantic, it’s necessary to tax or regulate pollution more seriously; the EU is ramping up fines on automakers that produce excessively polluting vehicles, but Robert Habeck, who is rather rigid on issues like nuclear power and the Autobahn speed limit, wants to suspend those fines since German automakers lag in electric cars.
On the matter of safety, it’s best to require cars to meet high standards of visibility and pedestrian safety in crashes, measured for example by survival rates at typical city speeds like 30 and 50 km/h. A car that fails these standards should not be on the road, just as cars are tested for occupant safety. If it means that the high, deep hood characteristic of the pickup truck no longer meets regulations, then fine; safety regulators should not compromise just because some antisocial drivers are acculturated to playing Carmageddon on real roads.
The key here is that regulations on emissions and personal injury liability suppress investment in larger cars, and that is good. There are other forms of capital investment in the economy competing for funding, which are not purely positional, for example housing, where German investment has been lagging due to high interest rates. Externalities are a real market failure and sometimes they get to the point that the product is, at scale, a net negative for society.


