FedEx Corp. converted 92 of its standard delivery trucks to hybrid-electric propulsion, expanding its hybrid-electric fleet by more than 50% to 264 total. The converted hybrids, produced in Charlotte, NC, during the past six months, were developed with Freightliner Custom Chassis Corp. and Eaton Corp., which provided the hybrid-electric systems. The trucks used in the retrofit program were 2000 or 2001 models with 300,000 to 500,000 mi (483,000 to 805,000 km) driven. The retrofit hybrid trucks are projected to improve fuel economy by 44%, decrease particulate matter by 96%, and reduce NOx emissions by 75% compared to the standard FedEx Express delivery truck. The 92 retrofit hybrids will be placed into service in California, primarily in the Los Angeles, San Diego, and San Francisco metro areas.