Access control: Improve traffic by controlling access.
Access control is essential to managing road network fluidity. A road may be artifically closed to avoid saturation or to prevent a dangerous situation. By doing this it is possible to limit the volume of traffic joining motorways in suburban areas when traffic is heavy, to stop access to saturated carparks and to prohibit the use of mountain roads which are susceptible to avalanches.
Operational management Monitor traffic, manage infrastructure, oversee conditions.
Installations which guarantee road, tunnel and car park safety or which monitor access to and manage road networks, are increasingly efficient. It is becoming crucual to warn drivers in a timely manner and to potentially guide them towards alternative routes. It is equally important to take into account rational energy management, an area of sustainability where it is impossible today to take any shortcuts.
Dynamic travel information system Inform users in real time, alert, anticipate
Specific signs used in dynamic travel information systems (traffic information, delays, weather conditions, estimated journey times...) are displayed on variable message signs. Designed to alert drivers, they display graphics and text in real time. The signs are typically installed on overhead gantries on motorways.
Safety: prevent and avoid accidents.
Safety devices in tunnels or on motorways are primarily connected to infrastructures (emergency refuge areas, emergency exits, emergency telephones). Permanaent road monitoring used to be an essential complement to automatic incident detection cameras. Today road safety has gone one step further with the introduction of ANPR (Automatic Number Plate Recognition): compliance with traffic rules and detection of any event that can put road users in danger.