Ali S. Al-Ghamdi (2007). “Experimental evaluation of fog warning system.” Accident Analysis and Prevention, Elsevier, Vol. 39, No 6, pp. 1065-1072.10.1016/j.aap.2005.05.007Ali S. Al-Ghamdi (2007). “Experimental evaluation of fog warning system.” Accident Analysis and Prevention, Elsevier, Vol. 39, No 6, pp. 1065-1072.

Choi, Saerona (2011). Effects of weather and traffic conditions on accident severity on freeways, Master's Thesis, Graduate School of Hanyang University.Choi, Saerona (2011). Effects of weather and traffic conditions on accident severity on freeways, Master's Thesis, Graduate School of Hanyang University.

Jo, H. R., Kim, Y. C. and Ha, D. I. (2011). “Development of uninterrupted flow variable speed model and analysis on its effect.” Korea ITS Association Journals, Vol. 10, No. 1, pp. 16-26.Jo, H. R., Kim, Y. C. and Ha, D. I. (2011). “Development of uninterrupted flow variable speed model and analysis on its effect.” Korea ITS Association Journals, Vol. 10, No. 1, pp. 16-26.

Jo, Y. T. and Jeong, I. B. (2010). “Real-time variable speed limit for city expressway.” Korea Information Science Society, Vol. 6, No. 10, pp. 962-974.Jo, Y. T. and Jeong, I. B. (2010). “Real-time variable speed limit for city expressway.” Korea Information Science Society, Vol. 6, No. 10, pp. 962-974.

Kim, J. K. (2008). Analysis on the characteristics of highway accidents utilizing EPDO for each traffic accident, Master's Thesis, Graduated School of Chonnam National University.Kim, J. K. (2008). Analysis on the characteristics of highway accidents utilizing EPDO for each traffic accident, Master's Thesis, Graduated School of Chonnam National University.

Lim, C. S. (2009). Analysis on the driving safety and investment effect using severity model of fatal traffic accidents, Doctorate Thesis, Graduated School of Pukyung National University.Lim, C. S. (2009). Analysis on the driving safety and investment effect using severity model of fatal traffic accidents, Doctorate Thesis, Graduated School of Pukyung National University.

P. Allaby, et al. (2007). Variable speed limits : Safety and Operational Impacts of a Candidate Control Strategy for Freeway Applications, IEEE, Vol. 8, No. 4.P. Allaby, et al. (2007). Variable speed limits : Safety and Operational Impacts of a Candidate Control Strategy for Freeway Applications, IEEE, Vol. 8, No. 4.

Park, J. E. (2009). Operational effect of variable speed control in uninterrupted flow, Master’s Thesis, Graduate School of University of Seoul.Park, J. E. (2009). Operational effect of variable speed control in uninterrupted flow, Master’s Thesis, Graduate School of University of Seoul.

Road Traffic Authority (2009; 2010; 2011). Development of Variable Speed Limit SystemⅠ·Ⅱ·Ⅲ (in Korean).Road Traffic Authority (2009; 2010; 2011). Development of Variable Speed Limit SystemⅠ·Ⅱ·Ⅲ (in Korean).

Samsung Culture & Traffic Research Center (2008). Introduction of variable speed limit (in Korean).Samsung Culture & Traffic Research Center (2008). Introduction of variable speed limit (in Korean).

Um, J. A., Lee, S. B. and Lim, C. S. (2011). “Analysis on the preference of traffic accident reduction solutions for structure improvement projects of urban dangerous roads through AHP decision-making model.” Collection of dissertations of Korean Society of Civil, Vol. 32, No. 2D, pp. 111-119.Um, J. A., Lee, S. B. and Lim, C. S. (2011). “Analysis on the preference of traffic accident reduction solutions for structure improvement projects of urban dangerous roads through AHP decision-making model.” Collection of dissertations of Korean Society of Civil, Vol. 32, No. 2D, pp. 111-119.