When minutes are important, we make the way clear

Traffic jams and slow-moving traffic are a daily occurrence in town centres and built-up areas.

This means that emergency services are also blocked, despite blue lights and sirens. But minutes can often decide the success or failure of an emergency callout.

The prompt recognition of such vehicles guarantees an advantaged pre-emption and thus a clear route to the scene of the emergency.

With this purpose, STGPS FreeWay can be a decisive help by providing pre-empted switching of existing traffic lights. Because emergency callouts are not bound to fixed routes, conventional acceleration systems, such as are used for public transport, cannot cope.

The new control system STGPS FreeWay enables automatic switching to green, particularly for special signal vehicles like fire service, ambulance and police. Signals are sent by the approaching vehicle, which are linked and thus dependant on the active special signal and which activate the green pre-emption switching of the traffic light.

The emergency services vehicle crosses the crossing in the quickest possible time, which functions reliably whatever of the route. This is achieved because the knot of vehicles in front can flow freely at the appropriate time.

The crossing is made clear by the vehicles passing through.

The emergency services vehicle crosses the crossing with the special signal always switched to GREEN.

This also considerably increases the safety of all other traffic participants.

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The STGPS FreeWay offers the following features:

• Evaluation of the status of the special signal
  Reports are only transmitted when the special signal is active.
• inimum reaction time
  Less than 100 milliseconds delay from passing a reporting station to the transmission of a radio telegram, which can be processed, and this also under unfavourable radio conditions.
• Precise reports
  The first radio telegram is sent almost exactly with the passing of the reporting station. Maximum tolerance: +/- 5m.
• Enormous range
  The last distance-dependant report after passing a specified GPS position can still be transmitted after more than 800 metres.
• Parallel operation
  The intelligent radio module can process a number of report chains in parallel and thus at the same time from a maximum of five successive GPS positions.
• Automated report process
  As the basic function for traffic light pre-emption, radio telegrams are transmitted dependant on distance, automatically and without action on the part of the driver.
• Integrated database
  All set values are saved in a reserved memory area on board as a special database for the system and can be configured by the user as required