1. Abdel-Aty, M., J. Dilmore, and L. Hsia. Applying Variable Speed Limits and the Potential for Crash Migration. In Transportation Research Record: Journal of the Transportation Research Board, No. 1953, Transportation Research Board of the National Academies, Washington, D.C., 2006, pp. 21-30.
2. Abdel-Aty, M., R.J. Cunningham, V.V. Gayah, and L. Hsia. Dynamic Variable Speed Limit Strategies for Real-Time Crash Risk Reduction on Freeways. In Transportation Research Record: Journal of the Transportation Research Board, No. 2078, Transportation Research Board of the National Academies, Washington, D.C., 2008, pp. 108-116.
3. Anund, A., and A. Ahlström. Evaluation of Local ITS Solutions in Urban Areas. No. 646. Swedish National Road and Transport Research Institute, Linköping, Sweden, 2009.
4. Bertini, R.L., S. Boice, and K. Bogenberger. Dynamics of Variable Speed Limit System Surrounding Bottleneck on German Autobahn. In Transportation Research Record: Journal of the Transportation Research Board, No. 1978, Transportation Research Board of the National Academies, Washington, D.C., 2006, pp. 149-159.
5. Carlson, R.C., I. Papamichail, M. Papageorgiou, and A. Messmer, Optimal motorway traffic flow control involving variable speed limits and ramp metering, Transportation Science, vol. 44, no. 2, pp. 238-253, 2010.