What are the free software on based GIS-technologies for the simulation regularities of traffic flows in the city? What are the free software for the optimization of traffic lights and other technical means of traffic control? What are the specific mathematical and information models to simulate scenarios for transport development in the city? What are the special technologies and algorithms for processing data traffic? As can be statistically modeled traffic flows if there is no data from surveillance cameras for traffic flow?
Free software and tools may not be available for your requirement, but can be customized using open source software like QGIS.
You can find at http://www.caliper.com/transmodeler/, there are some yseful information for you. On the internet, there are many paper about your problem. Beside, you can develop your application based on some open source softweres.
Search for Matsim, SUMO and Transim. They are all free, open source frameworks.
Dear Vitalii:
An application using Quantum GIS, previous adaptations and combination with other software you can find in the Road Traffic Control Laboratory (Traffic Lab) of Budapest University of Technology and Economics in the next link: http://www.traffic.bme.hu/
In addition to QGIS, they use Vissim, Visum and Siemens Scala.
I hope this information is helpful to you.
You can have a look at the attached paper. It deals with the large-area signal optimization based on flows from a macroscopic model and thus might be suited for your case of "no data from surveillance cameras for traffic flow".
Conference Paper Large-Scale Signal Optimization: Traffic Platform Framework ...
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