If this matches your interest, I can provide a (not the copyrighted PDF). For the complete paper, please search via your university library or Google Scholar using the citation above. Alternatively, if you meant a statistical report: Highway Statistics 2014 – Published by FHWA (U.S. Department of Transportation). Contains tables on mileage, vehicle-miles traveled, fuel use, and revenue. Available free online at www.fhwa.dot.gov/policyinformation/statistics/2014/ .
Please provide more details so I can give you exactly what you need. index of highway 2014