System to replace data transmission via analogue telephony in Switzerland


The Swiss Federal Roads Office (FEDRO) maintains around 500 counting stations for recording road traffic on the Swiss national road network and supplementary network. The data from numerous counting stations was previously queried using outdated analogue technology, which Swisscom AG switched over to 3G-based communication. In order to be able to retrieve the traffic data from the counting points Heusch/Boesefeldt developed the VBV (vehicle-by-vehicle) system on the basis of an existing specification.

The VBV system retrieves individual vehicle data (vehicle-by-vehicle data) from the counting stations using the new communication technology and supports the various protocols and formats of the different types of counting station devices used.

The central retrieval of individual vehicle data poses a particular challenge to the processing speed within the system. Therefore, a high-performance, standardized message broker for data distribution and a powerful and scalable NoSQL database for data persistence were chosen as the essential system components.

After transfer, the received VBV data records are converted into a uniform VBV format and then published via the Message Broker. The Message Broker is based on the standardized Internet of Things (IoT) protocol MQTT and provides the published data. The broker thus acts as a data distributor for recipients of VBV data.

Within the VBV system, there are own data users who process the data and, for example, provide aggregated hourly data in day files for the specialist application "traffic monitoring" or store the data in an archive.

After a trial phase of several weeks the system was approved and is now in productive operation.