Variable message signs

Tay, R. And A. De Barros (2010). Effectiveness of Road Safety Messages on Variable Message Signs. Journal of Transportation Systems Engineering and Information Technology 10 (3) 18-23. 

Traffic control and information devices, such as variable message sign, flashing beacons, and movable gates... 

FIGURE 8.1 Variable message sign (VMS) on the New Jersey turnpike. (Courtesy of Ben Schumin, http //commons.wikimedia.0rg/wiki/File New Jersey Turnpike Reduce Speed sign.jpg.)... 

Chatterjee, K. and McDonald, M. 2004. Effectiveness of using variable message signs to disseminate dynamic traffic information Evidence from field trials in European Cities. Transport Reviews, 24(5), 559-585. 

Janssen, W.H., van der Horst, A.R.A. and Hoekstra, W. 1992a. Tijd- en file-informatie op wis-selwegwijzers [Descriptive information presentation on variable message signs]. Report TNO IZF 92-C7. Soesterberg, the Netherlands. 

Wardman, M., Bonsall, P.W. and Shires, J.D. 1997. Driver response to variable message signs A stated preference investigation. Transportation Research Part C, 5(6), 389 05. 

Gibbard H.K. (1999) Highly reliable 50 watt fuel cell system for variable message signs. Proceedings of the European Fuel Cell Forum Portable Fuel Cells Conference, Lucerne, pp. 107-112. 

Saleh, W. Walker, C. Pai, C. 2009. Variable Message Signs Are they effective TDM measures . Travel Demand Management and Road User Pricing Success. Failure and Feasibility 135-150. Ashgate Publishing. 

Luoma, J., P. RSmS, M. Penttinen and V. Anttila (2000). Effects of variable message signs for slippery road conditions on reported driver behaviour. Transportation Res. F, 3, 75-84. 

Rama, P. (2001). Effects of weather-controlled variable message signing on driver behaviour. Doctoral dissertation, Helsinki University of Technology. VTT Publication 447. VTT-Technical Research Center of Finland, Helsinki. 

The minimum level of the sampling rate and reproduction frequency for a CMS in order to reproduce timed light signals (e.g. variable message signs or police signs) without loss, was not clarified. It is important the CMS displays the situation without time delay. 

A related approach is to vary the speed limit according to the traffic volume or weather conditions. We know that drivers slow down in adverse conditions, so the credibility of this approach is likely to be high. The use of variable message signs (VMSs) can become widespread and may be a more acceptable start to the process of matching all limits to the prevailing levels of protection. 

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