Automobiles

An experimental system called SignalGuru uses a network of smart phones in cars to minimize driver stops and starts. Cynthia Graber reports

German automaker Daimler and its partners will build the world's first nationwide hydrogen refueling infrastructure

The public-transit goals of "new urbanism" can fail if residents don't foresee true travel benefits

Joe Gibbs Racing is using a powerful Nikon microscope to help solve the mystery of engine failures that have cost the team several races

Braking via brain waves at the start of our intention to slow could stop a car 12 feet sooner at highway speeds. Karen Hopkin reports

Sensors on the scalp and muscles could help drivers respond more quickly to emergencies, but the technology is unwieldy at present

Books and recommendation from Scientific American

A study of driving behavior in areas with road cameras found fewer crashes and injuries, translating to big savings in repairs and medical bills. Cynthia Graber reports

An exploration of the vast dig that will soon become New York City's newest subway line

The Transportation Research Board will put cameras and other sensors in more than 3,000 cars to find out what drivers are doing right--and wrong. Steve Mirsky reports