Sitraffic STREAM – our satellite-based prioritization system:
Priority for mass transit!

STREAM stands for “Simple Tracking Realtime Application for Managing traffic lights and passenger information” and ensures that at every intersection the light automatically switches to green for an approaching bus and that the exact arrival time can be displayed anywhere along the route. Sitraffic STREAM benefits from the advantages of satellite navigation technology, which works without extensive and costly roadside installations. Every bus carries a so-called on-board unit (OBU). The OBU uses GPS to determine the vehicle’s exact position, and GPRS to transmit the positioning data as well as the vehicle’s passage of one of the pre-defined registration points to the traffic control center. Then the control center switches the traffic lights on the bus route to green as soon as the bus is approaching.

Reliable bus prioritization, immediate return to regular switching routines

Sitraffic STREAM allows online localization of every single bus. As soon as the bus has crossed the intersection, it signs off at the corresponding sign-off point and the control center activates the command to return to normal traffic light switching routines. The registration points are a purely software-based function and require no roadside infrastructure.
Video Version 06/2013

No special equipment for intersection controllers needed

The traffic controllers at the intersections can remain just as they are. No additional hardware components such as AFD, cables, receivers etc. are required to deploy Sitraffic STREAM because the vehicles communicate directly with the control center. From there, the system passes the relevant information on to the intersection controllers via existing communication links.

Successful deployment in Böblingen

In Böblingen, a mid-sized town south of Stuttgart, Sitraffic STREAM has been successfully performing as a prioritization solution for busses and fire brigade vehicles for some time now. The system was first tested at four intersections and yielded very positive results. At this point, the system is being put into place in the entire metropolitan area. “With Sitraffic Stream there is now an affordable and extremely reliable bus prioritization system for towns of the size of Böblingen,” says Reinhard Schopf, Traffic and Urban Engineering department Böblingen.

Excellent value - also in the experts’ eyes

  1. Best Practice Award for Telematics Applications
    For their joint Sitraffic STREAM pilot project, Siemens Mobility and Logistics and the town of Böblingen won the Best Practice Award for Municipal Telematics Applications in the “up to 50,000 inhabitants” category. The prize was created the European TelematicsPRO association in 2012.

  2. Winner of the “Landmarks in the Land of Ideas“ competition
    Sitraffic Stream in Böblingen is the 2013/2014 winner of the “Landmarks in the Land of Ideas” competition in the topic area “Ideen finden Stadt” (“Ideas for the city”).

  3. The city of Böblingen won the Innovation Award for Public transport (LPT) in 2015
    This prize, assigned by the Ministry of Transport and Infrastructure of the State of Baden-Württemberg, honors projects which serve as pioneers in mobility in the state of Baden-Württemberg.