Description
Road operators of the European Member Sates joined their initiatives to deploy Cooperative Intelligent Transport Systems (C-ITS). It is the goal to achieve cross-border C-ITS services for road users which requires co-operations between the automobile industry, ITS-technology providers and road operators using validated interoperable communication technology. While various applications on motorways such as warnings for traffic jams, road works and dangerous situations were deployed several years ago using In-Vehicle Signage, urban field test operations just started in several Austrian cities. Green Light Optimal Speed Advisory (GLOSA) helps to reduce the number of stops and fuel consumption if vehicles will adopt its speed according to green light prediction provided and communicated by the traffic controllers to vehicles. First tests in Vienna show that this will be beneficial especially for cyclists. The benefit of Signal Phase and Timing Information (SPTI) depends heavily on the quality of the traffic control algorithms. Traffic efficiency will increase if enough vehicles will provide their data (speed and position) and the signal control algorithms must be ready to optimize the signal timings. In Salzburg Emergency Vehicle Approaching at intersections is implemented and shown as In Vehicle Signage. Traffic Light Prioritization for trams and buses is standard in most Austrian cities. However, this is based on radio technology providing data such as line number, next stops and current delay among others. In Graz a project is launched to replace the old analog by modern communication technology. The traffic controllers are equipped with Road Side Units (RSU´s) which can receive and deliver information according to the ETSI ITS-G5 protocol. The On-Board Units of the transit vehicles have to be changed in order to request and receive signal messages (SREM/SSEM). After decades of successful transit signal priority this will add new functionality such as continuous monitoring of vehicle position and time table prediction (currently only at fixed radio beacons) and continuous traffic signal status available for transit vehicle driver. Delays of transit vehicles will be reduced, passenger comfort and energy efficiency will be improved by smoother rides with less acceleration and decelerations. Missing communication standards especially for the On-Board Units are delaying the mitigation towards the digital area in public transport priority.Period | 28 Jul 2024 → 30 Jul 2024 |
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Held at | Sichuan Police College, China |
Degree of Recognition | International |
Fields of Expertise
- Sustainable Systems