1. AASHTO,Washington, D.C. (2004). A Policy on Geometric Design of Highways and Streets.
2. Evaluation of Frequency and Injury Outcomes of Lane Departure Crashes;Benavente,2006
3. CODES Cost Estimates: Background and Methodology;Bigelow,2007
4. Median Barrier Guidelines for Texas (0-4254-1);Bligh,2006
5. A Seven-Year Analysis of the Safety Impacts of Crossover Median Crashes in Wisconsin, 2009–1;Chitturi,2009