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About the RTP

Image: RTP Transportation Collage

What is the RTP?

The Regional Transportation Plan (RTP) is a long-range transportation plan that is developed and updated by SCAG every four years. The RTP provides a vision for transportation investments throughout the region. Using growth forecasts and economic trends that project out over a 20-year period, the RTP considers the role of transportation in the broader context of economic, environmental, and quality-of-life goals for the future, identifying regional transportation strategies to address our mobility needs.


The issues facing Southern California today and in the future are complex and challenging. The RTP seeks to identify regional solutions to transportation issues in Southern California. This comprehensive approach to regional planning is imperative to maintaining the unique social, environmental, cultural, and economic vitality for the tens of millions of people who will live, work, and play in Southern California. Federal and state regulations require SCAG, as the Regional Transportation Planning Agency (RTPA) and Metropolitan Planning Organization (MPO), to develop an RTP every four years in order for our region's transportation projects to qualify for federal and state funding. The RTP is updated to reflect changes in trends, progress made on projects, and to adjust the growth forecast for population changes. The last RTP was adopted by SCAG's Regional Council in 2008, and work is now underway for the 2012 RTP.

What is SCAG's role in developing the RTP?

SCAG is the lead agency in facilitating the development of the RTP. As the planning authority for the six counties of Imperial, Los Angeles, Orange, Riverside, San Bernardino, and Ventura, as well as 189 cities, SCAG understands the importance of input and consensus, and utilizes a collaborative process to create the RTP. Throughout the development of the RTP, SCAG staff are guided by numerous task forces, the Plans & Programs Technical Advisory Committee, county transportation commissions, subregions, local governments, several state and federal agencies including Caltrans, environmental and business communities, tribal governments, non-profit groups, as well the general public. The end result of this collaborative process is an RTP that reflects public consideration and addresses the region's needs.

How does the RTP affect me?

Given the geographic diversity and size of Southern California, a coordinated transportation system that operates efficiently is imperative to the movement of people and goods. By employing a regional focus to transportation planning, SCAG seeks to enhance economic growth and improve our environmental quality while providing mobility for our residents.

RTP Focus Areas

  • Aviation
  • Environmental Mitigation
  • Goods Movement
  • Growth Forecast
  • High-Speed Regional Transport
  • Highways and Arterials
  • Land Use
  • Non-Motorized Transportation
  • Transit
  • Transportation Demand Management
  • Transportation Finance
  • Transportation Safety and Security