Technical Advisory Committees and Working Groups

Note: These meetings will not convene in person. All meetings will be teleconference-only until further notice.

Aviation Technical Advisory Committee

The Aviation Technical Advisory Committee (ATAC) is a group of aviation professionals (e.g. airport planners, transportation agency officials, academics) who meet quarterly in an effort to provide SCAG with technical and professional expertise on regional aviation issues. Information and data provided by the ATAC to the SCAG Aviation Program is used for the aviation element of the Regional Transportation Plan, as well as other planning and research efforts.

Staff Contact

Hiroshi Ishikawa
(213) 236-1838


Modeling Task Force

The Modeling Task Force (MTF) coordinates the Region’s various modeling programs and provides a forum to share model-related information, new ideas, and discuss data standards. Participation in the MTF is open to all interested parties including: governmental staff, educational related individuals/groups, environmental organizations, business groups, and the general public. The MTF is not a legislative body of SCAG, and therefore, meetings of the MTF shall not be subject to the Brown Act.

Staff Contact

KiHong Kim, PhD
(213) 236-1914


Regional Planning Working Groups

The Regional Planning Working Groups (RPWG) function as a forum for SCAG staff to engage stakeholders in the development and implementation of plans and policies to advance region’s mobility, economy, and sustainability. Areas of focus include: Active Transportation; Environmental Justice; New Mobility; Natural Lands Conservation; Public Health; Sustainable Communities; and Transportation Safety.

A few notes regarding participation in the meetings:

  • RPWG meetings are structured as open public forums for information sharing only.
  • RPWG participants do not vote or take positions on any policy issues.
  • SCAG staff organize and manage the meetings, with no formal chair or assigned roles for participants.
  • Meetings are open to the public and may include participation from peer stakeholders and staff from state, regional, and local agencies, non-profit organizations, local universities, and the business community.
  • RPWG meetings will be held monthly at SCAG’s Los Angeles Office (video-conferencing/teleconferencing will be available) through the development of the 2020 RTP/SCS.
  • RPWG meetings will be held for 2-3 hours following the Technical Working Group meeting, which is generally held on the third Thursday of each month.

Regional Transit Technical Advisory Committee

The Regional Transit Technical Advisory Committee (RTTAC), made up of representatives from the Region’s transit operators, provides a forum for coordination of input in the development of the Regional Transportation Plan and the Regional Transportation Improvement Program. Past discussion topics have included funding programs, intelligent transportation systems, transit-oriented development, and performance measures.

Staff Contact

Priscilla Freduah-Agyemang
(213) 236-1973


Technical Working Group

The primary purpose of the Technical Working Group (TWG) is to provide SCAG staff with a venue to vet technical matters as they relate to SCAG’s development of its regional plans, including the Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS). As established by the SCAG Executive Director, the TWG will serve as an advisory group to SCAG staff, and will provide technical input as requested on SCAG planning studies, as well as other Regionally Significant Transportation Improvement Studies (RSTIS) conducted by SCAG and/or other partner agencies. The TWG shall not serve as a policy or legislative body of SCAG and therefore, meetings of the TWG are not subject to the Brown Act.

Staff Contact

Ed Rodriguez
(213) 236-1863


Transportation Conformity Working Group

The Transportation Conformity Working (TCWG) is a forum to support interagency coordination to maintain transportation conformity and help improve air quality in Southern California.

The group meets on a monthly basis to facilitate an inclusive transportation/air quality planning process and to fulfill the interagency consultation requirements of the Federal Transportation Conformity Rule. The group helps resolve regional issues pertaining to transportation conformity and coordinates with and supports the Statewide Transportation Conformity Working Group.

Membership of the SCAG’s TCWG includes federal (US EPA, FHWA, FTA), state (ARB, Caltrans), regional (Air Quality Management Districts, SCAG), and sub-regional (County Transportation Commissions) agencies and other stakeholders.​

Federal & State Compliance

Learn more about Transportation Conformity Federal & Regional Compliance.

Staff Contact

Karen Calderon
(213) 236-1983