Below are some documents discussing transportation funding structures and future challenges.

Federal Transportation Funds in Washington State (PDF 62kb)
Office of Financial Management, June 2007

How Highway Funding Works (PDF 32kb)
To keep road building steady and predictable, Congress decides on contract authority and state allocations years in advance.

The Fuel Tax and Alternatives for Transportation Funding (PDF 1.2mb)
Transportation Research Board of The National Academies, 2006.

NCHRP Web-Only Document 102 (PDF 3mb)
Future Financing Options to Meet Highway and Transit Needs, December 2006.

Transportation Invest in our future (PDF 2.5mb)
Revenue Sources to Fund transportation Needs, September 2007

Transportation Invest in our future (PDF 5.6mb)
A New Vision for the 21st Century, July 2007

Transportation Invest in our future (PDF 1.98mb)
Future needs of the U.S. surface transportaion System, February 2007

Action Needed to Preserve Federal Highway Investment Commitments (PDF 91kb)
Potential Impacts and Outcomes, November 19, 2007.

Improving the Performance of the Surface Transportation System: Revenue Options (PDF 129kb)
Testimony of John Horsley, Executive Director, American Association of State Highway and Transportation Officials, March 19, 2007.

SAFETEA-LU, Distribution of Surface Transportation Program (STP) funds (PDF 29kb)
SAFETEA-LU is the acronym for the current federal transportation act, Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users.

Status of the Highway Trust Fund: 2007 (PDF 142kb)
CBO Testimony. Statement of Donald B. Marron, Deputy Director, March 27, 2007