Galileo Signal Priority
Background & Objectives
GPS has been taken up by public transport applications quite slowly compared to automotive navigation devices on the road. The current state-of-the-art in PT shows the deployment of different technologies, which are partly based on GPS, logical methods (e. g. door open signal) in combination with distance travelled or with position fixes through infrastructure based transponders (e. g. infrared or radio beacon). But there is no navigation solution to support all operational functions for PT.
Why this project is important for EGNOS/GSA/SatNav?
GSP is creating a GNSS based solution for Transit Signal Priority through the use of EGNOS/EDAS and Galileo.
The focus of GSP has been on transit signal priority (TSP) to overcome the last obstacle for a sustainable introduction of GNSS to support and improve all PT functions. With this step the existing infrastructure based systems (which are less flexible and more cost intensive) shall be dispensable, to save cost on equipment and maintenance and explore the full potential of on-board intelligence. In this context, the main objective of the current project is to develop a prototype for robust positioning, exploring EGNOS, EDAS or Galileo as the main sensor, in order to satisfy all PT requirements. In order to assure sustainability, a second objective is to develop new traffic light control schemes, which can explore the advantages of GNSS based systems in PT and overcome the deficiencies of costly infrastructure based systems.
How does it work?
Robust navigation, with high accuracy, full availability and integrity, has the potential to enable great improvements in PT operations. GSP is developing a robust positioning prototype for PT.
Work performed & results
The first feasibility tests on transit signal priority have shown that robust positioning could offer improvements of up to 50% compared to conventional systems, thereby accelerating PT and also allowing for longer green periods for private car traffic. Therefore, the project is expected to achieve the following results:
- Development of a robust positioning prototype to suit all PT requirements in a single solution.
- Shorter travel times for PT through advanced signal priority schemes.
- Enhancing capacity at traffic nodes for private car traffic by enlarging their green period.
- Achieving significant savings on investment and maintenance costs for the PT operator.
- Assessing the potential performance of the future Galileo system (IOC and FOC) and the resulting benefits for PT.