It's tough living in a densely populated city. The air is polluted, the roads are congested, and the gas is expensive. Many urbanites resort to scooters for transportation, because they're fuel-efficient and easy to maintain. The problem is that they still run on pricey gasoline and emit CO2 among other toxic chemicals. Gogoro's new Smartscooter aims to change some of these downfalls typically found in two-wheeled vehicles.

In the near future, America's enemies may soon learn that death comes on two wheels. First announced last year, the SilentHawk is a motorcycle for special forces, the kind of dirt bike someone would want in an apocalypse. Development on the motorcycle started last year, and DARPA recently granted makers Logos Technologies and Alta Motors an award to develop it further.

Tomorrow, in Fresno, California, the state's High-Speed Rail Authority will finally break ground on a long-awaited (and long-delayed) project: a high-speed rail line linking Los Angeles and San Francisco.

Last year at the Consumer Electronics Show, General Motors announced its plans to add 4G LTE connectivity to most of its vehicles by 2015. It was tough to picture exactly how The Internet of Things might revolutionize motoring then, but 2015 has arrived and it's all becoming clearer.

The most remarkable thing about the first hydrogen fuel cell vehicle that you can buy outright is how unremarkable it is to drive.

High above rural Arkansas, I'm jammed in the back of a small four-seat airplane. Andrew Barker pilots the aircraft while Austin Meyer sits beside him. Everything is going great—until the engine suddenly quits at 5,000 feet.