Study

Marijuana impairment is difficult to measure, making lawmaking tricky.

A report on emissions in Minnesota finds electric vehicles pollute substantially less than conventional cars, no matter the electricity source.

A study launched by VW and Shell looks to biofuels as a better way to achieve climate goals. Others see it as an attempt to block fuel-economy targets.

Younger drivers have more faith in self-driving features than older counterparts, J.D. Power study says.

Looking to lower your carbon footprint? This map will tell you which car to drive.

Roof racks waste increasing amounts of fuel through aerodynamic drag, but better design — and government policy — would help save gas.

Even with gas prices near their lowest point in more than a decade, Americans are still concerned about the fuel economy of their cars. More than 4 in 5 consumers say gas mileage will be an important consideration the next time they go shopping for a vehicle.

The common wisdom that moving away from dirty fossil fuels will take ages is flat-out wrong, says professor Benjamin Sovacool.

A study conducted by the National Renewable Energy Laboratory suggests that while half of respondents think plug-in electric vehicles are as good as conventional ones, only a fifth would consider actually buying one.

A new study shows that far fewer people are ordering manual gearboxes on leased vehicles, and the drop even more pronounced among men.

Who says the American love affair with cars is dead? Gasoline is cheap, and Americans are driving more miles than ever. New data shows that motorists in the United States paid their cheapest quarterly gas prices in 12 years in the first three months of 2016.

Having trouble seeing while driving at night? It may not be your eyes. Headlights on most new cars are downright terrible, according to the findings of a new study. As a result, motorists aren't getting the illumination they need to see the road and avoid obstacles at night.

Incorporating autonomy into EPA driving cycles could influence how automakers program their cars.

Indiana University lists the best cities in which to own a plug-in vehicle.

Teenagers today aren't super exited about Tesla, despite valuing sustainability and autonomous driving.

A new study compares the water usage of various fuels, and shows room for improvement for alternative fuels.

World's hybrids, plug-ins may total 17 million by the end of the decade, according to Juniper Research.

Elon Musk responds to new data from PayScale about the work environment at his companies, and says stress comes with the territory.

Pedestrian deaths are increasing at the fastest rate recorded since record keeping began more than four decades ago. Researchers project a 10-percent year-over-year increase in pedestrian deaths in 2015.

Failure to meet unrealistic goals has us looking for the next great green solution.