California’s Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project (HVIP) plays a crucial role in the deployment of zero-emission and near-zero-emission technologies. HVIP accelerates commercialization by providing point-of-sale vouchers to make advanced vehicles more affordable. Launched by the California Air Resources Board in 2009, the project is part of California Climate Investments. HVIP is the earliest model in the U.S. to demonstrate the function, flexibility, and effectiveness of first-come first-served incentives that reduce the incremental cost of commercial vehicles.