Connected Vehicle

Safer, faster and greener mobility

The United States Department of Transportation Highway Traffic Safety Administration estimates that 80% of crash scenarios involving non-impaired drivers could be addressed with Connected Vehicle technology. As vehicles, smart phones and traffic signals become aware of one another, violators are warned, vehicles avoid collisions and motorists are not stopped unnecessarily.


How Siemens Connected Vehicle works:

A vehicle awareness device broadcasts a basic safety message that includes vehicle latitude, longitude, heading and speed. Then, Siemens Roadside Equipment broadcasts traffic signal phase and timing (SPAT) for red light violation warnings to drivers and automatic braking systems. Once vehicles are aware of the location, direction and speed of other vehicles, drivers can be warned and vehicle active safety systems can avoid collisions. This allows drivers to be warned that a red light violation will occur well before entering the intersection.


Main components:


Roadside Equipment

  • 5.9 GHz rugged outdoor wireless Access Point

  • Sends traffic signal countdown to nearby vehicles

  • Receives location, heading, speed and priority of approaching vehicles


Class 1 On-Board Equipment

  • 5.9 GHz Vehicle Awareness Device that is factory-installed on new vehicles

  • Transmits vehicle location, heading, speed and priority


Class 2 On-Board Equipment

  • 5.9 GHz Vehicle Awareness Device aftermarket carry-on

  • Transmits vehicle location, heading, speed and priority


Class 3 On-Board Equipment

  • GPS or Smart Phone with adaptor for 5.9 GHz

  • Transmits vehicle location, heading, speed and priority


Wireless Message Set

  • SAE J2735 standard

  • Signal countdown, emergency and transit, etc.


Did this information help you?