Fuel cell vehicles have been in use by the U.S. Postal Service since 2004. The GM HydroGen3 fuel cell vehicle was tested in Northern Virginia starting in 2004 and in Irvine starting in 2006 with both test drive programs ending in 2007. The programs helped GM refine the technology of its fourth generation fuel cell vehicle.
Although GM is on track to develop and finalize the vehicle's propulsion system by 2010 it won't start selling the cars until a Hydrogen fueling infrastructure is in place nationwide, making the gas widely available.
There are about 70 hydrogen fueling stations nationwide with California leading the way with 25 of them. Although just two of them are available to the public, including one at UC Irvine, operated by the National Fuel Cell Research Center, and the other in west Los Angeles. A third is however set to open at LAX this fall.http://www.ocregister.com/articles/fuel-cell-vehicle-2103142-technology-irvine?slideshow=1