Kenworth recently delivered two prototype Near-Zero-Emission Kenworth T680 tractors to Total Transportation Systems Inc. (TTSI). Each is equipped with a series hybrid-electric propulsion system, Kenworth’s second-generation range-extended electric trucks, and can operate in zero-emissions mode on batteries for 30 miles. The batteries recharge while driving using the onboard generator powered by a near-zero emissions natural gas engine. TTSI rigorously tests…