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2. Federal Highway Administration. (Accessed on May 25, 201).Minnesota Partnership Agreement National Evaluation: Surveys, Interviews, and Focus Groups Test Plan. http://ntl.bts.gov/lib/32000/32500/32527/chap11.htm
3. Minnesota Department of Transportation. (Accessed on June 11, 2011). 2010 Vehicle Miles of Travel Trends by District in Minnesota http://www.dot.state.mn.us/traffic/data/reports/VMT%20Trends%20by%20District%20in%20Minnesota.pdf
4. Minnesota Department of Transportation. (Accessed on June 20, 2011).Benefit-Cost Analysis for Transportation Projects. http://www.dot.state.mn.us/planning/program/benefitcost.html
5. Sightline Institute. (Accessed on June 16, 2011). Carbon Dioxide Emissions Per Mile Traveled. http://www.sightline.org/maps/charts/pollu_co2transp_ooh