1. Analysis of Traffic Growth Rates;Barrett,2001
2. Bostrom, R., Mayes, J., 2002. Highway Speed Estimation for MOBILE6 in Kentucky. Kentucky Transportation Cabinet.
3. California Air Resources Board, 2009. Resolution 09-53, Amendments to Assembly Bill 1493, Pavley Regulations.
4. California State Senate, 2008. Senate Bill 375, Chapter 278, SB-375, Sacramento, California.
5. Council of the European Union, 2009. Regulation (EC) No. 443/2009: Setting Emission Performance Standards for New Passenger Cars as Part of the Community′s Integrated Approach to Reduce CO2 Emissions from Light-Duty Vehicles. Official Journal of the European Union, L140/141-115.