Chapter 135 of 2017 (AB 398, E. Garcia) requires our office to annually report on the economic impacts and benefits of California’s statutory greenhouse gas (GHG) emission goals—statewide emissions to 1990 levels by 2020 and to 40 percent below 1990 levels by 2030. This report provides our assessment of the effects, of major policies in the transportation sector intended to help meet these goals, as well as identifies some key issues for the Legislature to consider as it makes future policy and budget decisions. In a companion report, Assessing California’s Climate Policies—An Overview, we describe the general types of economic effects of state climate policies, key challenges in measuring these effects, and broad issues for the Legislature to consider when designing and evaluating its climate policies.