Likewise, BMW withdrew its own test fleet of 100 cars with internal-combustion engines modified to run on hydrogen.

ECONOMIST: Tech.view: Hydrogen tries again | The

Beginning in late 2012, the Swedish carmaker will deliver a test series of up to 200 vehicles to Siemens, which will then be tested and validated under real-life conditions as part of a Siemens internal test fleet.

ENGADGET: Volvo and Siemens team up to build better electric engines

Currently, airlines complain that they have to test each model of device individually, on every single plane in the fleet, and with a separate empty flight used for each test, before they're allowed to relax the rules for that model.

ENGADGET: FAA to take 'fresh look' at gadget restrictions on flights

It is launching a fleet of spy satellites and plans to test a rocket that can reenter the atmosphere--officially, for space shuttle research.

FORBES: Japan Weapons, Inc.

The Navy's submarine fleet in the Pacific has already experimented with a pilot breath-test program that began in 2009.

WSJ: Navy, Marines to Require Breath Tests

Both airlines have upgraded and test-flown one Concorde, and are working on the rest of their fleet.

ECONOMIST: Any day now the supersonic jet will be cleared for take-off

Google's fleet of vehicles started with Toyota Prius Hybrids and later added the Lexus RX450h, a crossover SUV, to test on different terrain.

CNN: Self-driving cars now legal in California