The EPA is playing a leading role in the Federal Government's growing efforts to accelerate the development of fuel cell technology, especially for vehicle applications. A collaborative effort between the EPA, Daimler Chrysler, and UPS is under way to put several zero-emission, hydrogen powered package delivery vehicles into commercial service in Michigan. Much of the testing conducted is performed at the National Vehicle and Fuel Emissions Laboratory (NVFEL) in Ann Arbor, Michigan, where many of the testing protocols to handle hydrogen fuel were developed.