Transportation Finance


The Southern California Association of Governments’ (SCAG) Transportation Finance Program seeks to optimize the region’s transportation systems by planning for the long-term financial needs of the region. SCAG is working to address funding shortfalls by researching and promoting innovative financing techniques, and developing strategies for the Regional Transportation Plan (RTP), so that the greatest amount of transportation dollars are available to the region. In doing so, all forms of potential funding for transportation are analyzed and evaluated by SCAG.


2012-2035 RTP/SCS Financial Plan Highlights

You can access the financial plan chapter of the 2012-2035 RTP/SCS either via the iRTP version or as part of the  2012-2035 RTP/SCS print version in Adobe Acrobat PDF format. The Transportation Finance Appendix is also available as an Adobe Acrobat PDF file.

Status of the HTF

The CBO estimates that the highway account of the trust fund may have difficulty meeting all obligations during the latter half of fiscal year 2014. Additional details are available at: Testimony on the Status of the Highway Trust Fund

Highway Trust Fund Ticker

​Based on current spending and revenue trends, the U.S. Department of Transportation estimates that the Highway Account of the Highway Trust Fund will encounter a shortfall before the end of fiscal year (FY) 2014. See USDOT HTF Ticker for more details.


Mobility Innovations & Pricing

Mobility Innovations and Pricing (MIP) is SCAG’s first study to emerge from the diversity, equity, and inclusion initiatives the organization has instituted during the past 18 months. This report focuses on the potential equity implications of road pricing and other innovative transportation policies in the six-county SCAG region.


Value Pricing

SCAG is evaluating how value pricing can contribute to reducing congestion, improving air quality, and enhancing transportation revenues. SCAG aims to understand the ways in which value pricing, along with a variety of other congestion management approaches, can improve travel conditions in the region, and provide associated economic, and public health benefits. The analysis will evaluate various value pricing strategies to determine how they can help meet regional goals. SCAG will identify strategies and specific implementation actions that could be pursued over long-term.


Mileage-Based User Fee

Advancements in technologies enabling greater use of electric or alternative fuel vehicles will continue to impact gas tax revenues. The U.S. Energy Information Agency estimates that fuel efficiency for all light-duty vehicles (cars and light trucks) will steadily increase, from an average weighted MPG of just over 20 in 2010 to over 36 in 2040. The fuel efficiency of freight trucks also is expected to improve, although at a slower rate, from an average weighted MPG of over 6 in 2010 to over 8 in 2040. This projection assumes there is not a major paradigm shift in vehicle fuel technology, such as affordable electric cars or hybrid heavy-duty trucks. It also assumes no shift will occur in public policy or public attitudes that encourage people to reduce their long-term travel habits or shift to more efficient vehicles more quickly. Given the growing concern about climate protection and fuel price volatility, however, such changes are likely, which would lead to a more rapid deterioration in the long-term viability of the current fuel tax.