Adequate planning of traffic requires that one has appropriate models for computing traffic volumes and making predictions. We make use of many such models and computer programs in which they are implemented. One program of this type is Capcal, which we produced for the Swedish Road Administration. It is used for computing traffic capacity at intersections.

Another computer tool we utilize is PTV Vision – a program package for traffic simulation which contains the following programs:

• VISEM, travel demand forecasting for transportation of all types
• VISUM, information and planning system to be used for general purposes or in connection with public transportation
• VISSIM, simulation of traffic flow on a microscopic and a mesoscopic level
• CROSSIG, design tool for traffic signal control
• VisVAP, flow chart editor for traffic-responsive signal control

The use of GIS, Geographical Information Systems, for traffic purposes has increased remarkably. GIS provides a sound basis for many traffic decisions, in part through enabling simulations of different traffic solutions to be made, doing so at low cost.

The use of transport informatics is increasing. It can concern the technical specifications for such systems as those for parking-space allotment, for the control of VMS (variable message signs), and the like and also comparison of the effectiveness of different informatics systems.

More information

If you wish to learn more, please contact Anna Djärv, 0046-8-545 161 82 or Jesper Nordlund, 0046-46-38 65 08.