Transportation

The high cost of fuel means that greener fleets can save companies, municipalities -- and therefore, taxpayers -- big money with the added benefit of driving up the visibility and popular appeal of fuel-efficient cars.

The auto manufacturer teams with power companies to tackle the technical challenges of plugging cars into the grid and to educate consumers.

While competitions like the 2,400-mile North American Solar Challenge have yet to lead to a commercially viable solar vehicle, the potential for practical application of new technologies engineered for such events should not be underestimated.

General Motors races to finish the Chevrolet Volt plug-in vehicle. A tour of the design shop and chat with the engineers reveals how close they are.

As bicycling grows in popularity as both a hobby and as an ultra-efficient means of transportation, it's ushering in a new crop of organizations that fulfill community needs.

Michelin has hit the road marketing a commercial tire that promises to help trucks achieve greater fuel efficiency than comparable products.

The humble bicycle is an ultra-efficient form of transportation, but rusty biking skills and safety concerns keep many people in their cars. Enter Susan McLucas.

Los Angeles continues to add and widen highways knowing that traffic will only get worse. It's time to wake up to mass transit.

The California Air Resources Board wants manufacturers to use a swath of clean technologies to keep drivers from using vehicle air conditioners, and for good reason: Automobile air conditioner use accounts for 16 million tons of carbon per year.

Think your hybrid can't break 100 miles per gallon? A new breed of efficiency-obsessives begs to differ, employing a range of fuel-saving driving techniques to make the most of every precious drop of gas.