Intersection with Highly Adaptive Traffic Lights Can Still Be Suitable for C-ITS Service GLOSA

The C-ITS service "Green Light Optimal Speed Advisory" (GLOSA) is a highly promising Day1.0 services for efficient, environmentally friendly and safe cooperative transport. It will play a crucial role in the increasing automation of assistance and driving functions in cooperative connected automated mobility (CCAM). Over the past three decades, significant efforts have been made to make traffic light signalling as adaptable as possible to traffic requests. However, there is a common belief that the more flexible the control, the less reliable the forecast and thus the functionality of GLOSA. This paper introduces stability indicators to demonstrate that this belief is only partially accurate. The proposed tool allows for the analysis of historical data from existing systems to derive an indicator for the quality and suitability of the C-ITS GLOSA application. We demonstrate the feasibility of the approach using real world data from the C-ITS corridor Hamburg, Germany.