Current traffic state

PTV Balance allows you to orchestrate traffic lights across multiple nodes and activate green waves. The model-based network control optimises the signal programs every five minutes in response to current traffic flows.

At the heart of PTV Balance is a two-layer real-time transport model. In the initial macroscopic stage, PTV Balance uses detector data to derive the traffic density on individual routes and side roads. This stage can also be handled by PTV Optima, the model-based solution for traffic prediction, which increases sensitivity to known roadworks and accidents.

Based on the results of the macroscopic model, PTV Balance calculates a number of different strategic framework signal plans. An integrated mesoscopic model evaluates the different signal control options over multiple nodes in just a few seconds, taking into account their effects on stops, waiting times and blocking backs. The evaluation is based on a custom performance index, which represents the weighted sum of all stops, waiting periods and blocking backs. The weighting can be adjusted for each signal group by the traffic engineer. Furthermore, a range of calculation results are recorded and displayed in a custom graphical user interface (GUI), making it easier to calibrate PTV Balance as part of a simulation, or to improve monitoring during operation.

PTV Balance then transmits the optimal framework signal plan to the local control devices, where they are either applied directly or refined locally using a tactical optimisation tool, such as PTV Epics. PTV Balance repeats the full optimisation process every five minutes.

A demand model created in PTV Visum serves to provide PTV Balance with network and demand data. At the same time, this can also be used as an input for PTV Vissim, as well as for testing and calibration. The parameters of the traffic lights can be edited and applied across all programmes by PTV Visum, PTV Vissim, PTV Balance or PTV Epics.

Working with PTV Balance

PTV Balance has a custom graphical user interface (GUI) that makes it easy to calibrate PTV Balance as part of a simulation, or to improve monitoring during operation.

Compare the status quo with PTV Balance’s recommended optimization: The web-based GUI gives information about the Performance Index and displays the level of service descriptively. Furthermore, you can configure the parameter you would like to analyze easily.
It’s comfortable working with the signal control editor to set the parameter of each signal control and to decide about the interstages and the weighting for each signal group.
Thanks to its seamless integration you can test in PTV Vissim to what extent PTV Balance’s optimization has been put into practice and compare the simulation with the reality. For a smooth simulation you can switch on or off several elements of the signal control due to your needs and also have a look at the single signal control instead of the whole corridor.
The junction editor of PTV Visum allows you to adjust lanes, turns and signalization of the single nodes.

Contact Headquarters

Phone: +49 721 9651-300

Further information

PTV Balance Brochure