Green Priority (GP)

Green Priority (GP)

Green Priority (GP)

Green Priority provides aims to change the traffic signals status along the route of a priority vehicle (e.g., public transport or emergency vehicles), halting conflicting traffic and allowing the vehicle right-of-way, to help reduce service and response times and enhance traffic safety. For safety, environment, traffic flow or other reasons it can be advantageous to give priority to specific classes of vehicles. This service allows drivers of priority vehicles to get priority at signalised junctions.

Participating actors in Green Priority include public transport services providers, emergency services providers, designated vehicle drivers, who desire a safe and comfortable driving experience, service providers / software providers wishing to promote their services / software, municipalities wishing to improve city liveability, image and safety of their citizens, traffic operators wanting to decrease the number of accidents.

The objective of Green Priority is to increase punctuality of the services provided with designated vehicles and enhance traffic safety.

Business Models

Taking into account various stakeholders’ views, a list of business model blueprints that address current or future challenges of urban areas, together with their operating and value-capture scenarios depicting the inner-workings of the business models, and the exchange of costs-benefits among stakeholders, have been created for the Green Priority service.

Architecture

ITS-G5

In case of ITS-G5 communication technologies the information flow starts at the vehicle by the On-Board Unit for the 802.11p communication. The messages go through the Connection Provider Back Office, in order to forward them to the relevant Roadside Units, for the On-Board Unit the range of the antenna ensures that information only arrives at relevant Roadside Units. The Roadside Units then evaluate whether the priority request should be granted or not, this is based on the information supplied and the validity of Public Key Infrastructure certificates. There is also a path back to the vehicle, this gives feedback about the status of the priority. This is again directly to the On-Board Unit. The Service Provider Back Office arranges the authorizations and contracts on the background. However, this is not a continuous information flow and only serves for initialization. The GeoMessaging pseudonymous login is also a sequence where the Service Provider Back Office is involved. Another actor involved in the background is the Traffic Management System, this system configures the level of priority and can be involved in the authorization process. Lastly, the Service Provider Exchange System is involved in increasing the visibility of the service to attract more consumers and to provide Public Key Infrastructure. For 802.11p there is also an upward information flow when either On-Board Units or Roadside Units detect a local road hazard, it can be pushed directly into the Connection Provide Back Office for further dissemination to Personal Information Devices without connection to an 802.11p On-Board Unit.

Cellular

In case of cellular communications the information flow starts at the vehicle by the Personal Information Device. The messages go through the Service Provider Back Office, in order to forward them to the Traffic Management Center which forwards the information to the Roadside Units. The RSUs then evaluate whether the priority request should be granted or not, this is based on the information supplied and the validity of Public Key Infrastructure certificates. There is also a path back to the vehicle, this gives feedback about the status of the priority by the Communication Provider Back Office.

Architecture schema

Detailed information about Green Priority architecture can be found here.

Suppliers

Suppliers of components and solutions for the Green Priority service include research institutes, such as CTAG, as well as private companies, such as NeoGLS, Dynniq, and Swarco.

Within the C-MobILE project the Green Priority service is implemented in six Deployment Sites: Bordeaux, Copenhagen, Newcastle, North Brabant, Thessaloniki, and Vigo.

Bordeaux

In Bordeaux the Green Priority service is implemented on a defined area containing five successive intersections approaching an hospital. The service provider is NeoGLS. In collaboration with Gertrude, when an RSU detects the presence of an equipped emergency vehicle, it forwards a priority request to the Traffic Light Controller, which will pass the lights to green at this traffic light, but also on the traffic lights ahead, to clear the way for the emergency vehicle until he reaches the hospital.

Copenhagen

In Copenhagen the Green Priority service is based on direct ITS-G5 communication technology. Roadside Units (RSU) connected to the Traffic Light Controllers communicate directly with designated vehicles which have On-Board Units (OBU) installed. Upon arrival within a certain range, the OBUs signal the RSUs with the appropriate standards for messaging and communication and, if the timing is right, the vehicles receive a green light extension. This service is deployed for designated vehicles and in 7 intersections.

Newcastle

In Newcastle the Green Priority service is implemented via ITS-G5 technology. The service covers 18 signalized intersections on a key route heading north out of the city centre. Along with the GLOSA, it is used by Arriva express buses to enable more efficient fleet operation and more reliable journey times. Siemens UK is the service provider in collaboration with Newcastle City Council and Zircon (HMI designer).

North Brabant

In North Brabant the Green Priority service is based on ITS-G5 communication technology. This service covers a several signalized intersections of the busiest roads in the city of Helmond.

Thessaloniki

In Thessaloniki the Green Priority service is implemented as proof of concept in a simulated environment (cmobile.imet.gr).

Vigo

In Vigo the Green Priority service is implemented as proof of concept in a simulated environment with the aim to minimize the driving time towards their destination for designated vehicles when they are assigned a priority status over the general traffic.

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