Summary

The National Capital Region Transportation Planning Board (TPB) conducted, with consultant assistance, a scenario study to assess ways to reduce greenhouse gas (GHG) emissions in the on-road transportation sector. The study assessed the types of transportation-related actions, and their levels of implementation, that might be needed to reduce GHG emissions to meet regional goals for 2030 and 2050. The region’s officials approved a new goal to reduce GHG emissions by 50 percent in 2030 relative to 2005 levels.

The study reviewed studies by TPB and COG that quantified GHG reductions from regional on-road transportation projects, programs, and policies, including the “What Would it Take?” Scenario Study, the Multi-Sector Working Group study, and the Long-Range Plan Task Force study. The report also discusses the collaborative actions proposed to reduce GHG emissions from the on-road transportation sector that were identified in the Metropolitan Washington 2030 Climate and Energy Action Plan to support the region in achieving its 2030 GHG emission reduction goals.