here - Orange County Transportation Authority

supervisors, 10 city members, two public members, and the Director of Caltrans District
12 as a non-voting member.
As the Countywide transportation planning agency, OCTA prepares the County-level
LRTP that offers input into SCAG’s RTP and is incorporated into the OC SCS, which in
turn is incorporated into the RTP/Regional SCS. This incorporation ensures consistency
among the subregional and regional transportation planning documents.
Center for Demographic Research (CDR)
Since 1996, the CDR at California State University, Fullerton, has undertaken a
consistent and collaborative effort to collect and compile data, and to generate socioeconomic
projections that accurately represent all 35 local jurisdictions in the County of
Orange.
The CDR maintains a centralized data source of Orange County demographic
characteristics, including population, housing, and employment. These data are used by
public and private agencies and individuals. Sponsors of the CDR include the County of
Orange, Orange County Transportation Authority, Orange County Council of
Governments, Orange County Sanitation District, Transportation Corridor Agencies,
Municipal Water District of Orange County, Orange County Water District, and the
Orange County Local Agency Formation Commission.
The socioeconomic data and growth forecasts for the OC SCS process and document
were developed through the Orange County Projections process, involving extensive data
collection, analysis, outreach, and review directed and managed by the CDR.
Southern California Association of Governments (SCAG)
SCAG is the MPO that encompasses the counties of Imperial, Los Angeles, Orange,
Riverside, San Bernardino, and Ventura. As the MPO, SCAG prepares the RTP and the
Regional SCS, setting forth forecast development patterns for the subregion, the SCS
transportation network and projects, and strategies to reduce greenhouse gas emissions.
Once the SCAG Regional SCS is adopted, SCAG submits the SCS to the CARB (see
below) for review. Included in this submittal is the quantification of GHG emissions
reductions achieved by the Regional SCS.
California Air Resources Board (CARB)
At the state level, the CARB is responsible for setting GHG emissions reduction targets
for each region of the State. These targets are scheduled to be updated every eight years.
However, CARB has the option to revisit the targets every four years. CARB also
comments on the methodology to be used by each MPO for measuring GHG emissions.
SCAG submits the adopted Regional SCS to CARB for review. CARB cannot modify the
Regional SCS and is limited in its action either to accept or to reject the MPO’s
determination that the SCS will achieve the targets if implemented.
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