I meant something more akin to "miles driven" as a benchmark for utility/importance [0]. Yours is a good clarification and qualification, however. ______ 2010

I meant something more akin to "miles driven" as a benchmark for utility/importance [0]. Yours is a good clarification and qualification, however. ______ 2010> 2,648,456 2009> 2,633,248 [0] http://www.fhwa.dot.gov/policyinformation/statistics/2010/vm1.cfm#foot5 http://www.fhwa.dot.gov/policyinformation/statistics/2010/vm...