The California State Transportation Agency develops and coordinates the policies and programs of the state's transportation entities to achieve the state's mobility, safety, and air quality objectives from its transportation system.

Effective July 1, 2013, the Governor's Reorganization Plan No. 2 of 2012 created the Secretary for Transportation. The 2013-14 and 2014-15 transportation responsibilities of the Secretary for Business, Transportation, and Housing are merging into this Secretary. The 2012-13 budget information for transportation responsibilities is displayed in the Secretary for Business, Transportation, and Housing (Organization Code 0520). In addition, the Office of Traffic Safety is merging with this Secretary. The 2012-13 budget information for the Office of Traffic Safety is displayed in Organization Code 2700 under the new Transportation Agency.