Effectiveness of Newly Introduced Variable Message Signs in Al-Khobar, Saudi Arabia

  • Nedal Taisir Ratrout King Fahd University of Petroleum & Minerals
  • Yazan F Issa King Fahd University of Petroleum & Minerals
Keywords: VMS, ITS, traffic congestion, traffic information, message signs,


Recently, Variable Message Signs (VMS) were introduced in Saudi Arabia and their reliability under local environment is being tested. This paper aims to evaluate the possible response of the drivers to VMS when used for messages related to traffic conditions. A major arterial in Al-Khobar city in Saudi Arabia with a massive VMS board was selected for this paper. The evaluation process started by interviewing drivers selected randomly from the study area. About 77% of the interviewed drivers indicated positive attitude toward messages requesting change of route. The drivers’ interviews demonstrated statistical relationship between the degree of response to messages requesting change of route and the reason for such request. The maximum response was for messages related to accidents, roadwork activities, and traffic congestion. A field experiment was also conducted along the studied arterial. It was found that VMS statistically increased the percentage of diverted traffic during specific peak periods.

Author Biographies

Nedal Taisir Ratrout, King Fahd University of Petroleum & Minerals

Professor & Chairman

Civil & Environmental Engineering Department

King Fahd University of Petroleum & Minerals


Saudi Arabia

Yazan F Issa, King Fahd University of Petroleum & Minerals

Graduate student

Civil & Environmental Engineering Department

King Fahd University of Petroleum & Minerals


Saudi Arabia



Al-Washykree A. Facsimile Memorandum. Statistical Department of the Directorate General of Traffic, Ministry of Interior, Saudi Arabia; June 13, 2012.

CEN – European Committee for Standardization. EN 12966-1:2005, E. Brussels, Belgium; 2005.

Barnard Y, Risser R, Krems J. The Safety of Intelligent Driver Support Systems. Farnham: Ashgate Publishing Company; 2011.

Dos Santos C. Assessment of the safety benefits of VMS and VSL using the UCF driving simulator [M.S. Thesis]. Orlando, Florida: University of Central Florida; Spring Term 2007.

Borrough P. Variable speed limits reduce crashes significantly in the UK. The Urban Transportation Monitor. March 14, 1997.

Lee C, Hellinga B, Saccomanno F. Assessing safety benefits of variable speed limits. Transportation Research Record: Journal of the Transportation Research Board. 2004;(1897):183-190.

Lyles R, Taylor W, Lavansiri D, Grossklaus J. A field test and evaluation of variable speed limits in work zones. Presented at the 83rd Annual Meeting of the Transportation Research Board. Washington, DC; 2004.

He S, Guan W. Evaluation of the effects of variable message signs at urban traffic network. IEEE International Conference on Industrial Technology (ICIT 2006); 2006.

Shang HY, Huang HJ, Gao ZY. Impacts of variable message signs on traffic congestion. Science in China Series E: Technological Sciences. 2009;52(2):477-483.

Edara P, Sun C, Keller C, Hou Y. Evaluating the benefits of dynamic message signs on Missouri’s rural corridors. Final Report prepared for Missouri Department of Transportation, Project TRyy0947; Sept. 2012.

Wang JH, Collyer CE, Yang CM. Enhancing motorist understanding of variable message signs. Report No. FHWA-RIDOT-RTD-06-1. Kingston, RI 02881: University of Rhode Island; 2006.

Ran B, Barrett B, Johnson E. Evaluation of variable message signs in Wisconsin: Driver survey. Final Report No. 0092-45-17. Wisconsin Department of Transportation Research, Development & Technology Transfer; 2004.

Shirazi E, Anderson S, Stesney J. Commuters’ attitudes toward traffic information systems and route diversion. Transportation Research Record. 1988;(1168):9-15.

Chatterjee K, Hounsell N, Firmin P, Bonsall P. Driver response to variable message sign information in London. Transportation Research Part C: Emerging Technologies. 2002;10(2):149-169.

Erke A, Sagberg F, Hagman R. Effects of route guidance variable message signs (VMS) on driver behaviour. Transportation Research Part F: Traffic Psychology and Behavior. 2007;10(6):447-457.

Cummings M. Electronic signs strategies and their benefits. Seventh International Conference on Road Traffic Monitoring and Control. London, UK; April 26-28, 1994. p. 141-144.

Davidsson F, Taylor N. ITS modelling in Sweden using CONTRAM. TRL Report 2003/04; 2003.

Høye A, Sørensen M, Elvik R, Akhtar J, Nævestad T, Vaa T. Evaluation of variable message signs in Trondheim. TØI Report 1153. Oslo: Institute of Transport Economics, Norwegian Centre for Transport Research; 2011.

Nygardhs S, Helmers G. VMS–Variable message signs - A literature review. VTI Rapport 570A; 2007.

Peeta S, Ramos JL. Driver response to variable message signs-based traffic information. IEE Proceedings, Intelligent Transport Systems. 2006;153(1).

Bhattacharyya GK, Johnson RA. Statistical Concepts and Methods. John Wiley & Sons Inc.; 1977.

] Sudman S. Applied Sampling. New York: Academic Press; 1976.

How to Cite
Ratrout NT, Issa YF. Effectiveness of Newly Introduced Variable Message Signs in Al-Khobar, Saudi Arabia. PROMET [Internet]. 2014Apr.26 [cited 2019Dec.15];26(2):169-77. Available from: http://traffic.fpz.hr/index.php/PROMTT/article/view/1305