Traffic control with Variable Message Signs

Mode of operation

With traffic control systems and by the use of Variable Message Signs (VMS) on the Berlin motorways traffic data such as speed, traffic volume, moisture and visibility are automatically collected and evaluated by traffic computers. Depending on the traffic situation the computers send commands to the Variable Message Signs in order to automatically activate speed limits, passing prohibitions or warning notices as "Traffic Jam" and "Slippery Road", and to make traffic flow more smoothly. Tunnels will be automatically closed by means of signals in case of fire danger.
Furthermore the traffic control centre has the option to manually activate the mentioned traffic notices and also other ones such as "Danger", "Construction Site", or "Danger of skidding due to ice or snow", and lane closures.