Although the Obama administration has a stated goal of buying only alternative-technology vehicles for the federal government's fleet of vehicles by 2015, the number of hybrid and electric vehicles bought by the government dropped by a third last year, according to Bloomberg News.

The National Highway Traffic Safety Administration wants vehicles to be louder when going less than 18 miles per hour so cyclists and pedestrians can hear them better.

The Nascar season opener will be called the Sprint Unlimited at Daytona and will be run on Feb. 16 at 8 p.m. Eastern time.

Only 23,461 Chevy Volts were sold last year -- about a third of one percent of all new passenger cars in the United States -- but they may be the harbingers of a shift on roads around the world.

When power flickers, so does consumer enthusiasm. Yet some manufacturers are pushing ahead with the idea that a profound need exists.

Fisker Automotive has filed a lawsuit against its insurance company after being denied coverage for 338 Karma plug-in hybrids that were destroyed in Hurricane Sandy.

The E.P.A. says the Fusion Energi can get the equivalent of 108 miles per gallon in city driving.

Mainstream car buyers don’t understand that the higher upfront cost of an electric vehicle could be recouped, at least in part, by cost savings on fuel, a new study says.

It has been a good year for the electrification of the automobile. No fewer than eight significant plug-in models came to market in the United States in 2012.