Grünphase

Grünphase is a term often used in traffic engineering and urban planning to describe the period during a traffic signal cycle when a specific traffic movement is permitted to proceed. This is the phase where drivers facing a green light are allowed to enter the intersection. The duration of the Grünphase is determined by various factors, including traffic volume, pedestrian crossing times, and the overall signal timing plan designed to optimize traffic flow and safety.

The implementation of Grünphase is crucial for the efficient operation of signalized intersections. It ensures that vehicles and pedestrians have designated safe passage, preventing collisions and congestion. Traffic engineers carefully calculate the length of each Grünphase to balance the needs of different traffic streams, including vehicular traffic, cyclists, and pedestrians. Sometimes, a Grünphase may be extended or shortened dynamically based on real-time traffic conditions detected by sensors.

The concept of Grünphase is closely linked to other signal phases, such as the yellow phase (caution) and the red phase (stop). Together, these phases form a complete traffic signal cycle, guiding the movement of traffic through an intersection. Understanding the Grünphase is fundamental to comprehending how traffic signals manage the complex interactions at busy road junctions.