emissions

Planning for an uncertain future

By Chris McCahill Traffic forecasts and other projections are often presented as a single line on a graph or number in a chart. But we know—now more than ever—that these predictions are full of uncertainties. The Sacramento Council of Governments (SACOG), for a new study in JAPA, puts hard

Exposure to particulate pollution shown to increase COVID-19 death rate

By Michael Brenneis Coming at a time when the current federal administration continues to relax pollution controls, a new paper under review presents evidence that exposure to pollution—including that from motor vehicles—reduces the survival rate of individuals who have contracted COVID-19.

Major American automakers eying SUVs over electric vehicles

By Chris McCahill Transitioning to electric power has been a major focus of state and local agencies trying to meet ambitious emissions reduction goals. That involves rolling out more charging stations, bolstering the grid, and offering incentives for drivers to go electric; but consumers will

Residential exposure to local traffic emissions associated with higher risk of stroke

By Yicong Yang A recent study finds that long-term residential exposure to locally emitted black carbon (BC)—primarily from traffic exhaust—is associated with higher stroke incidence. BC comprises a significant portion of particulate matter. Although BC is a known health hazard with health

Global SUV sales undo gain from electric vehicles

By Robbie Webber Electric vehicles have the potential to significantly reduce emissions and the climate impact of transportation. But the global increase in SUV sales—led by but not exclusive to the U.S.—is more than neutralizing these reductions. That is the message from an analysis of the

Proximity to highways affects long-term school performance

By Robbie Webber A study from the National Bureau of Economic Research extends our knowledge of the effects of attending school near major roadways. Previous studies have found short-term effects on test scores, behavior, and school absences on days of poor air quality, but this new research

Nine states and DC move forward on transportation carbon pricing alliance

By Eric Sundquist Nine Northeast and Mid-Atlantic states, plus the District of Columbia, announced Tuesday that they would design a joint climate strategy over the next year and then put it up for state-by-state adoption. The policy will, according to the joint announcement, “reduce carbon

Ecommerce fulfillment centers increasing freight pollution, congestion in rural towns

By Chet Edelman As of 2018, about 5 percent of total retail sales in the United States occurred through online shopping. For the upcoming holiday season that share is temporarily expected to jump to 16.7 percent. In order to keep up with ever-increasing demand, ecommerce companies such as Amazon

Gas stations venting ten times more gas vapor than once believed

By Michael Brenneis Exposure to the chemicals contained in gasoline vapor poses serious risk to human health. Technologies have been implemented to reduce the amount of gasoline vapor released along the supply chain and during the routine fueling of vehicles. The evaporative loss during storage

Pricing mechanisms key to reducing transportation emissions

By Chris McCahill Cities, counties, and states are setting ambitious emissions reduction goals, requiring them to cut transportation sector emissions, which account for more than a quarter of the national total. Electric vehicles powered by clean energy could make a big difference, but it is