1. Innovative alternatives to fuel tax as a primary road funding source: Oregon"s point of purchase mileage charge collection pilot program;J M Whitty;Journal of Public Works and Infrastructure,2008
2. Ibid.
3. The initial reports outlining the proposed test of the VMT fee started in 2003 and the commission report deemed the program "feasible" in the 2007 report to the legislature;J M Whitty;Oregon Department of Transportation,2005