The First Update includes additional clarification and edits to reflect comments received by ARB over the past several months. The First Update will be presented to the Board on 22 May 2014 for consideration for approval.

The AB 32 Scoping Plan, which guides development and implementation of California’s greenhouse gas emission reduction programs. The Air Resources Board is required to update the Scoping Plan every five years.

Among the actions proposed or considered in the transportation sector include:

• aggressive implementation of the light-duty Zero Emission Vehicle standard;

• LEV IV emissions regulations for the light-duty fleet post-2025 (GHG reductions of about 5% per year);

• Phase 2 GHG regulations for medium and heavy-duty (MD and HD) vehicles;

• a possible ZEV regulation for trucks;

• more stringent carbon reduction targets for the Low Carbon Fuel Standard; and others.

Continuing progress on light-duty vehicles beyond the scope of the Advanced Clean Cars program with a LEV IV standard targeted at achieving additional GHG emission reductions of about five percent per year beyond 2025 would reduce new vehicle emission standards to about 125 grams of carbon dioxide equivalent per mile (gCO₂e/mi) in 2030 and to below 100 gCO₂e/mi by 2035. Furthermore, commercially available technologies, such as fuel efficient passenger vehicle tires, can be utilized by both new and in-use vehicles in the near-term to achieve GHG emission reductions. Deployment of fuel efficient vehicle tires for in-use vehicles could include limited incentives, followed by ratings and then standard setting to permanently shift the market.

Achieving our long-term climate goal and 2032 ozone standards will require a much deeper penetration of ZEVs into the fleet. As outlined in the 2009 ZEV Review and the 2012 Vision for Clean Air, and several independent studies… the light-duty vehicle segment will need to become largely electrified by 2050 in order to meet California’s emission reduction goals.

—First update