Rush hour will likely return when pandemic lockdowns lift, but a new study suggests that congestion pricing - policies that charge tolls for driving during peak hours - could not only cure traffic jams but also convince motorists it is safe to buy smaller, more efficient cars. Researchers from Washington State University and the Brookings Institution studied a sample of nearly 300 households in the Seattle area over a six-year period, finding that the more congested their commutes, the more likely they would buy bigger cars which they perceive as safer and more comfortable. They then modelled what congestion pricing might do to change car purchase decisions, finding it would reduce the market share of mid- to full-size SUVs by 8%. Nationally, shrinking that number of large vehicles on the road would mean a 10% decline in the vehicle fatality rate, saving lives and $25 billion in associated costs as well as another 3% in improved fuel efficiency which amounts to nearly $10 billion in savings. "We found that congestion pricing can reduce congestion on one side and reduce vehicle size on the other," said Jia Yan, WSU economics professor and corresponding author on the study published in the Journal of Econometrics. "Then the positive impacts of decreasing vehicle size mean that energy consumption and fatality rates can also drop." In 1980, light trucks and SUVs made up only about 20% of new vehicles sold. In 2017, that figure had risen to 62%. Previous research indicates that traffic jams can lead to an "arms race" with drivers buying bigger and bigger cars for their perceived personal safety on congested highways when accidents are more likely to occur. "If the highways you are travelling on are very congested, and you are sitting in a small car surrounded by many large SUVs, that may motivate you to purchase a larger car to protect yourself. It's logical reasoning," said Yan. "If the congestion decreases, and drivers can easily travel... |