Green waves in use

The HALI project relates to the use of »green waves« for the police, fire service, and ambulances. Emergency vehicles often encounter full or blocked intersections and/or traffic lights on red, forcing them to stop at each intersection and proceed with caution. When responding to an emergency, however, every second counts – and collisions with emergency vehicles at intersections are among the main causes of accidents. The HALI project was launched with a view to preventing this risk and ensuring that emergency vehicles can pass through intersections unimpeded. As the idea originated in Finland, the acronym is derived from the Finnish phrase lytysajoneuvojen liikennevaloetuudet (»traffic signal priorities for emergency vehicles«).

How does HALI work?

Thanks to the networking of traffic lights and reliable positioning of emergency vehicles, it’s possible to transmit positioning data to the lights as the vehicle approaches. Via a central HALI server, this data is combined with information relating to timing and the traffic situation so that traffic lights can be switched to green in an emergency vehicle’s direction of travel with pinpoint precision. At the same time, the lights are switched to red for other arms of the intersection. Galileo PRS ensures reliable positioning without the risk of improper use (spoofing) or interruption of signals by a noise source (jamming).

Other topics


KI4Tools – intelligent hand-operated tools

With a retrofittable sensor module for hand tools, it’s possible to measure various parameters during work processes in order to ensure process optimization, transparency, and quality.


5G Bavaria in dialog

In collaboration with NIK, the network for the digital economy of the Nuremberg Metropolitan Region, Fraunhofer IIS is presenting the fifth generation of the mobile communications network as part of its 5G Bavaria initiative. Over four events, the Institute will examine the capabilities and opportunities of the technology from a theoretical and a practical perspective.


HMI — Self-sufficiency itself!

As part of the live stream, Fraunhofer IIS presented the basis for interactive and self-sufficient Industry 4.0 processes and smart mobility applications in collaboration with the Fraunhofer CCIT Research Center IoT-COMMs.


Joseph von Fraunhofer Prize 2021 for mioty® robust IoT sensor network

Reducing the energy consumption of entire industrial complexes, optimizing the irrigation of fields, or monitoring CO2 emissions are just some of the capabilities of mioty®.


Smart infrastructure improves road safety

Identifying all road users is a difficult task – particularly at intersections with poor visibility. The HORIS radar system is designed to tackle precisely this problem.


Testing to verify distance estimation

Tests of the official Corona-Warn-App involved re-enacting realistic scenarios with 10 to 20 test subjects, who wore helmets equipped with markers.


mioty® for farming

The Regional Sensor Cloud allows agricultural sensor data to be captured and evaluated. Equipped with mioty® technology, the sensors supply local measurement readings such as soil moisture and soil temperature at various depths, humidity and air temperature at various altitudes, and rain measurement data.


Building and home control using a mioty® Class B extension

mioty® Class B offers  a powerful alternative for smart building and smart home applications in particular. A single base station is sufficient to interconnect and control actuators and sensors located everywhere from the basement to the roof.