In late August 2011, the FHWA discovered an input error in the light truck vehicle-miles traveled (VMT) calculation. This error, multiplied by fuel economy and percentage of off-the-road use, had resulted in a significant underestimation of light truck use in FY 2009, 2010, and 2011. For the FY 2008 apportionments (using 2007 data), the VMT entry was 11,467 miles. For FY 2009 through 2011 (using 2008-2010 data), the VMT entry was about 1,100 miles, but should have been 11,100 to 11,500. The corrected entry for FY 2012 was 11,218 miles.
One of the original concepts for the Recreational Trails Program was that program should return a portion of HTF revenue attributable to non-highway recreational fuel use to the trail users paying into the system.
The full copy of the draft document and tables is attached