REROUTING - CONTROL OF TRAFFIC FLOWS IN THE ROAD NETWORK

Local traffic management measures can avoid disturbances on certain routes to a certain extent or reduce their impact. If a route is still congested, traffic flows can additionally be rerouted if appropriate alternatives are available within the network. This rerouting is achieved by means of detour recommendations.

The basis of this network control is the network model with representations of the main and alternative routes. For the decision whether a rerouting is reasonable, not only the current traffic situation should be used. The prediction of the short- to medium-term traffic development is necessary in order to act in time and to avoid reactions to short-term situations. As a basis for decision-making, a statistical database is available that depicts the characteristic traffic in the network, taking into account classified events.

• The current traffic state is incorporated into the decision via a procedure for congestion detection with loss time determination, whereby a prediction is made for the development of congestion.
• With the information available for the routes, the best one can be determined and displayed using rule-based decision logic. Via freely definable metaprograms, the application of complex, combined measures can be achieved.
• Since automatic activation of displays is often not desirable, the system provides an several options to support the operator in his decision-making. After the respective check, a decision is made on which measures are to be taken and activated.

The architecture of our systems with their open interfaces allows easy integration of external algorithms.

To ensure that individual routing and collective network control are as coordinated as possible, the recommended routes are transmitted digitally as geo-coordinates to the vehicle's navigation system, where they can be automatically processed accordingly.