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The city of Böblingen is using an infrastructure solution from Siemens which ensures that public transport is punctual. And the people of Böblingen too.
Buses on time, smoothly flowing traffic and lower CO2 emissions. Sitraffic STREAM from Siemens is an intelligent traffic prioritization system that makes sure buses and emergency vehicles in Böblingen automatically get the green light.
It sounds like an impossibly complex system with a large number of moving parts, but it is a reality in Böblingen, where smooth traffic is now the standard. Sitraffic STREAM ensures that urban traffic flows seamlessly, with the added benefit of reduced CO2 emissions.
Up until now, only analog traffic control solutions for buses and emergency vehicles were an option for smaller cities and communities due to high implementation costs. Enter Sitraffic STREAM, which is completely digital. Only a small on-board unit (OBU) with integrated GPS and GPRS antenna is required to be installed in vehicles. The OBU uses GPS to determine the vehicle’s exact position, and GPRS to transmit the positioning data to the traffic control center. When pre-defined virtual registration points are passed, the central control system changes the signal to green. As soon as the vehicle has crossed the intersection, the signal returns to normal operation. Waiting times for regular traffic are minimal.
In addition, the position data is used to monitor vehicle departure times at transit stops in real time. A big plus for passengers: Overall punctuality of public transport is improved and buses run more reliably. CO2 emissions in cities decrease, because buses move through the city more smoothly, offering an attractive alternative to private transport.
Fire Departments also benefit from these innovative solutions: Emergency vehicles must no longer drive through red lights at intersections. Rescue teams are able to reach victims more rapidly and offer better emergency care by avoiding the added stress of navigating traffic at high speed.
Siemens with Sitraffic STREAM active is an economic, reliable and sustainable urban traffic solution designed for a green city.
The adverse effects for individual vehicles are minimal — which is a major factor in the quality of a prioritization system, especially in the rush hour.
Emergency vehicles provide their location data to the traffic control center, which immediately switches coming traffic lights to green. The system uses on-board units with GPS and requires no roadside installations.
Sitraffic STREAM is a satellite-based prioritization system for local public transport systems and emergency vehicles. It ensures that traffic lights at intersections automatically turn green for incoming buses and emergency vehicles. What makes it special is that the digital Siemens solution does not require expensive installations along or by the side of the street, nor does it need complex vehicle alterations. Instead, it just needs an easy-to-mount box with GPS and GPRS antenna. In this way, cutting-edge traffic technology can also be economically used for smaller towns and communities.
As the bus makes its rounds, it uses GPS to keep track of its location and GPRS to transmit the data to the traffic control center. From there, existing communication links pass the relevant information on to the intersection controllers, so buses don’t have to stop at a red light.
Before reaching an intersection, buses cross two registration points. The on-board unit alerts the control center so upcoming traffic lights react in time. Once buses cross the sign-off point, after the intersection, traffic lights resume their normal routine. This ensures normal traffic is not delayed any more than necessary.
Sitraffic STREAM has been successfully implemented in the German town of Böblingen, south of Stuttgart. The system was initially tested at only four intersections, where it delivered very positive results. The system is now being deployed citywide. Fire department rescue vehicles also benefit from Sitraffic STREAM. They can get to incidents faster and much more safely, as they no longer have to risk crossing red lights at intersections.
Increasing inner-city traffic can only be managed with a high performance, integrated system. Sitraffic STREAM ensures that traffic flows better and the environment is less impacted.