The Advanced Clean Trucks (ACT) standard ensures gradual reductions in climate-disrupting and health-harming tailpipe pollution by steadily phasing in supply targets for manufacturers to deliver higher numbers of zero-emission medium- and heavy-duty vehicles to participating states. ACT never reaches a 100% zero-emission requirement in any vehicle class, and does not impose requirements on vehicles that are already on the road or on the secondary market.




Letters from Advocates to Policymakers


Letters from Policymakers to OEMs