Dynamic Junction Control System


CHAOS reduces delays and emissions at the signalized junctions by changing green light time internals dynamically depending on the number of vehicles on each approach. CHAOS systems can communicate with each other via wireless connection modules for signal coordination and network optimization.

CHAOS consists of traffic cameras, which detect, count and track vehicles in real time, a fisheye camera for observation purposes and the Dynamic Junction Control Unit, CENTRIS. Traffic cameras are located at each approach, and each of them consist of a digital camera, an image processing board and a wireless communication module, which is for transmitting data to CENTRIS and the Traffic Control Center.

The results of more than 700 CHAOS installations worldwide show that, the junctions with CHAOS experienced a decrease of 30% of waiting time and more than a third in traffic accidents.

With CHAOS...

Less congestion at junctions and the road segments between the junctions
Minimized waiting times at junctions and total time spent in traffic
Less environmental pollution by reducing emissions and noise pollution
Contribute to the country’s economy with less fuel consumption
Due to green light time intervals produced by the system, decrease on red light violations and traffic accidents

CHAOS, the first and patented Dynamic Junction Control System in Turkey

Dynamic Junction Control System

Signal Coordination with CHAOS

CHAOS systems can communicate with each other via wireless connection. This property can be used for signal coordination between consecutive junctions. The main purpose of signal coordination is to reduce travel times along a corridor by coordinating the junctions. This application is generally known as “green wave” and used to reduce corridor travel time, delays and traffic congestion at the junctions on a corridor. It is also possible to manage the junctions in both coordinated and actuated mode, which makes vehicles either not waiting in the red light or waiting for a very short time.

Emergency Vehicle Preemption System

With CHAOS, it is possible to give priority to emergency vehicles coming from any approach of the junction. Emergency vehicles which are defined in Traffic Control Center software are detected and tracked by using GPS data. CHAOS calculates the best scenario to minimize emergency vehicle delays. Vehicle preemption algorithm runs to minimize the conflicts and prevent possible accidents at the junctions.