Sustainable freight transportation: California takes the lead


According to the US Environmental Protection Agency (EPA), the transportation sector is one of the largest contributors to anthropogenic US greenhouse gas (GHG) emissions, accounting for 28% of total GHG emissions in 2016. Cars and light duty vehicles lead the pack of polluters, but trucking is the second leading source of transportation end-use sector emissions. Light and heavy duty trucks represent 23% of emissions in the transportation sector.

EPA and the National Highway Traffic Safety Administration (NHTSA) are taking coordinated steps to enable the production of a new generation of clean vehicles. While much has improved over the years with clean air regulations, EPA still expects that heavy-duty trucks will be responsible for one-third of nitrogen oxide (NOx) from transportation in 2025 and recently announced the Cleaner Trucks Initiative (CTI) to update standards for NOx emissions from highway heavy-duty trucks and engines.

In 2011, EPA in coordination with NHSTA, issued greenhouse gas emissions and fuel economy standards for medium and heavy duty trucks manufactured in model years 2014-2018. The agencies estimate that the combined standards will reduce CO2 emissions by about 270 million metric tons.

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