Traffic light systems with detectors

If detectors for traffic light systems are embedded in the roadway and no level differences occur, they do not cause disturbing impulse noises and thus have no impact on noise emissions and noise exposure. If the detectors are mounted on the surface of the SDA pavement, this can lead to stronger impulse noises due to the level difference. In the canton of Aargau, the detectors are therefore standardly cast into the pavement and only mounted externally in provisional measures.