zero emission vehicles

Have you ever wondered how many mail trucks are owned by the United States Postal Service, or how old they are?  The short answer is “a lot, and very old.” Approximately 140,000 of the familiar old Grumman mail trucks, created in 1989, are currently on the road, and their average age is over 27 years old. Prototype of new mail truck by Oshkosh Defense As part of the modernization efforts of the USPS, Wisconsin-based Oshkosh Defense was awarded a $482 million contract to design and plan new mail trucks over the next ten years, the first…