California Air Resources Board

Principal Investigator/Author: Kenneth Kurani

Contractor: University of California, Davis

Contract Number: 19RD010

Project Status: Complete

Relevant CARB Programs: Heavy-Duty Vehicles, Mobile Source Emissions Research Program, Advanced Clean Trucks, Advanced Clean Fleets, Innovative Clean Transit, Low Carbon Fuel Standard, Zero-Emission Transportation

Topic Areas:  Air Pollution, On-Road Heavy-Duty Vehicles, Zero-Emission Vehicles (ZEVs), Greenhouse Gas Emissions Network, Tracking Emissions

Research Summary:

To attain air quality goals, GHG reduction targets, and clean energy requirements, California's trucking fleet must transition to low-NOX technologies, alternative fuels, and zero-emission vehicles wherever possible. To enhance the effectiveness of its incentive programs and the predictive accuracy of its transportation emissions modeling, CARB seeks to better understand the factors that determine medium and heavy-duty truck fleet turnover, and how their influence varies by fleet type, location, and industry. Direct communication with industry sources will be used to identify the determinants of fleet vehicle turnover for trucks operating in CA, and to characterize their application to decisions affecting high-priority vocations, industries, and vehicle classifications.

Keywords: air quality, greenhouse gas (GHG), GHG reduction, clean energy, truck, fleet, low-NOx, zero-emission, ZEVs, heavy-duty truck