ABSTRACT
In the road environment, the main functions of Intelligent Transport Systems (ITS) are to promote road safety and improve traffic flow via effective communication to drivers. Variable Message Signs (VMS) are currently one of the most powerful and widely implemented tools for this matter. These new road signs are indeed flexible: a VMS can be on and off; serve different road functions (warn, regulate, advise); display different elements (pictograms, text, or both); and adopt different message formats. By displaying complex, real-time road information, VMS intend to contribute to a higher efficiency and integration on the road transport system.
