To reduce traffic deaths, public transit should be seen as a core part of safety infrastructure, not just an alternative mode of travel. Every day, thousands of car crashes occur in the U.S., resulting in injury or death, yet they receive far less attention than the much rarer crashes involving public transit. For city planners working to reduce roadway fatalities, understanding how these perceptions influence travel choices is critical.
VMT
Driving trips are dropping, especially among young people
For years, people wondered whether travel would bounce back after the pandemic. The latest FHWA data, along with other new research, gives a clearer answer. Growth has slowed. In 2024, total vehicle miles traveled (VMT) finally inched past its 2019 peak, but by only 0.5%. On a per capita basis, Americans are still driving less, down 2.3% since 2019.
California will let agencies pay for housing to offset increased driving
A new California law gives transportation agencies the option to pay into an affordable housing fund to offset the increased travel demand associated with major road projects. The approach could achieve several goals at once: mitigating emissions from highway expansions, creating a new funding stream for affordable housing, and helping more people live in accessible neighborhoods, reducing their transportation costs.
Congestion pricing could be the only path to managing gridlock
Transportation agencies in the U.S. spend billions of dollars each year expanding highways to ease gridlock. Yet commute times have increased 20% over the last 50 years and traffic congestion is still worsening, according to a several reports. New research confirms congestion pricing may be the best path toward any kind of relief. New York’s program, which launched in January amid plenty of controversy, looks like a promising example.
The benefits of transit extend well beyond transit riders
Public transit is often viewed by planners and transportation officials as a key strategy for reducing car dependency, easing traffic congestion, and lowering emissions. Every person who opts for transit over driving helps reduce the total miles driven in private vehicles. According to a large national study, however, good transit has a ripple effect on land use and travel behavior. For every mile not driven by transit riders, transit accounts for another six to nine miles not driven among the larger population.
Moving from LOS to VMT is more complicated than it might seem
Traffic engineers across the U.S. are accustomed to measuring road performance in terms of “level of service,” or LOS. Recognizing its unintended consequences, many transportation professionals and advocates have urged the industry to replace it with something better. However, LOS has become so ingrained in many processes that there is probably no single alternative to its use.
States must step up efforts to reduce harmful carbon emissions
As of last September, 16 states and Puerto Rico approved legislation requiring reductions in greenhouse emissions. The White House also set ambitious goals of cutting emissions by at least 50% below 2005 levels in 2030. They aim to achieve a net-zero economy by 2050. Contributing to 29% of all greenhouse gas emissions in the U.S., the transportation sector is now the top producer and accounts for a growing portion each year. More than half of these emissions (57%) come from personal vehicles such as cars, SUVs, and light-duty trucks. Progress in cutting those emissions has been slow, let alone efforts to measure and track them.
Workers offset their commute travel when working from home
The massive shift to remote work during the pandemic altered the way many offices operate and increased interest in the potential for widespread telecommuting to help reduce traffic, transportation emissions, and other harmful impacts. We have reported several studies, however, that suggest remote work simply lets people drive at different times of day and for purposes other than commuting. A new study backs that finding.
To manage traffic, researchers ask: “Whose miles are these anyway?”
Several states and many local governments are growing more interested in measuring vehicle miles traveled (VMT) as a key indicator of transportation emissions levels and other unwanted impacts. But measuring VMT, especially at the local site level, can be more difficult than it seems. A new study in the Journal of the Planning Association points to data sources, shortcomings, and considerations for measuring VMT in the future.
State DOTs are key players in cutting transportation emissions
Through a combination of carrots and sticks—but mostly carrots—the federal government has encouraged state DOTs to take ambitious steps to lower the environmental impacts of transportation and to invest in more sustainable travel options. Two years into the Bipartisan Infrastructure Law (BIL), notes Adie Tomer at Brookings, it is still hard to know the impacts. Many states are still operating under the status quo. Others, however, including many SSTI partners, are seizing the opportunity to bolster ongoing local sustainability initiatives.