Q. Monthly Highway Vehicle Miles Traveled Statistics
Monthly highway travel volume statistics for the country and by region and state can be found in the Federal Highway Administration's Traffic Volume Trends (TVT): http://www.fhwa.dot.gov/ohim/tvtw/tvtpage.cfm
Annual vehicle miles traveled statistics are available in the publication Highway Statistics 2012, Section 5: http://www.fhwa.dot.gov/policyinformation/statistics/2012/vm1.cfm
More years of Highway Statistics and more VMT tables can be found at http://www.fhwa.dot.gov/policy/ohpi/hss/index.cfm
If you have any questions about this data, send an e-mail to firstname.lastname@example.org.
The Federal Highway Administration home page is: http://www.fhwa.dot.gov
Projections of Vehicle Miles Traveled through 2035 can be found in the Department of Energy's Annual Energy Outlook 2011: Transportation Sector Key Indicators and Delivered Energy Consumption (table 7): http://www.eia.gov/oiaf/aeo/tablebrowser/#release=AEO2011&subject=0-AEO2011&table=7-AEO2011®ion=0-0&cases=ref2011-d120810c
The complete Annual Energy Outlook 2011 can be found at http://www.eia.doe.gov/forecasts/aeo/index.cfm