Traffic Signal Control System with Extended Logic in the Context of the Modal Split

The paper is presents the discussion on the concept of extending the logic of the traffic signal control algorithms at the road intersections with additional decision making criteria. Currently typical traffic signal control logic at an signalised intersection is usually based on the measurements of the cross-section characteristics of traffic at detector on intersection approach or in a broader case over the approach area of the controlled object. The traffic control criteria are therefore only partial descriptive characteristics of the traffic. These authors point out the existing problem of the balancing of supply and demand for the usage of a road network, in the context of traffic organisation and management. A modification of theF.V. Webster's formula has been presented as an example of an application of the proposed control logic. In alignment with the contemporary policy of the sustainable development of the transportation this problem has been complemented with the discussion on influencing the modal split. The presented extended logic of traffic signal control at the intersections is therefore predestined to utilise optimally both the spatial potential of road networks (their capacity) as well as their modal split.