The California Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project (HVIP) is a program that provides simplified incentives to assist fleets in purchasing hybrid and battery-electric trucks and buses, addressing the high upfront costs. Funded by the California Air Resources Board, the program offers up to $85,000 per vehicle, with $14 million available and a first-come, first-served application process. Public fleets have special provisions for reserving vouchers, and various vehicle categories and additional funding options are included to promote cleaner transportation.