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The South Coast Air Quality Management District (SCAQMD) Heavy-Duty Natural Gas Drayage Truck Replacement Program addressed a significant need to reduce diesel emissions and associated public health risks from goods movement at the Ports of Los Angeles and Long Beach. The two Ports, located adjacent to one another, constitute America’s largest port complex and are ranked among the busiest container ports in the world. This project replaced 219 older, heavy-duty diesel trucks servicing the Ports or other goods movement operations in the region with new natural gas trucks powered by ultra-clean natural gas engines. The project also included education, outreach, and training activities to promote the use of alternative fuel vehicles.