C-ITS Architectures (Efficiency)

Efficiency C-ITS Services

Green Priority (GP) aims to change the traffic signals status in the path of an emergency or high priority vehicle (e.g., public transportation vehicles), halting conflicting traffic and allowing the vehicle right-of-way, to help reduce response times and enhance traffic safety. This service is also known as “Traffic signal priority request by designated vehicles” or “Priority Request”. Different levels of priority can be applied, e.g. extension or termination of current phase to switch to the required phase. The appropriate level of green priority depends on vehicle characteristics, such as type (e.g. HGV or emergency vehicle) or status (e.g., public transport vehicle on-time or behind schedule). The vehicles request priority for an intersection, and the traffic light controller determines in what way it can and will respond the request.

This service architecture is largely based on the ARC-IT service package Transit Signal Priority, with customizations to support local user needs.

Green Light Optimal Speed Advisory (GLOSA) operation is based on intersection geometry (MAP) and Signal Phase and Timing (SPaT) messages. Traffic light status and timing information should be transmitted at a pre-defined transmission rate. This information should then allow the calculation of an optimal speed for crossing the traffic light. Updated traffic light information or advice to drivers should be provided via Human Machine Interface (HMI). GLOSA information should be provider to users with an appropriate timing and under the prerequisite that is compliant with local laws and rules. A Roadside System broadcasts the signal states and the time for the next signal to a Traffic Management System that forwards it to the back-office system of the Service Provider. Optimal speed profiles are calculated for different locations and transmitted to the back-office system of the Communication Provider.

This service architecture is largely based on the ARC-IT service package Eco-Approach and Departure at Signalized Intersections, with customizations to support local user needs.

Cooperative Traffic Light for VRUS (CTLVRUs) aims to increase the safety of pedestrians through warranting priority or additional crossing time (i.e., extending the green light phase or lessening the red phase) based on pedestrian characteristics (or on special conditions, such as weather). The service can also be extended to cover other VRUs, such as cyclists. The service is also known as “Pedestrian Mobility” or “Traffic light prioritisation for designated VRUs”.

This service architecture is largely based on the ARC-IT service package Pedestrian and Cyclist Safety, with customizations to support local user needs.

Flexible Infrastructure (FI) aims to interchange information about the lanes provided to the traffic users according to the time of the day. It includes solutions such as reserved lane.

This service architecture is largely based on the ARC-IT service package Intermittent Bus Lanes, with customizations to support local user needs.

In-Vehicle Signage (IVS) aims to provide information to the driver about the road signs (and dynamic information, e.g., local conditions warnings identified by environmental sensors). The purpose of this service is to increase the likelihood of drivers being aware of potentially dangerous conditions in case a roadside traffic sign is not noticed.

This service architecture is largely based on the ARC-IT service package In-Vehicle Signage, with customizations to support local user needs.

Mode & Trip Time Advice (MTTA) aims to provide a traveler with an itinerary for a multimodal passenger transport journey, taking into account real-time and/ or static multimodal journey information.

This service architecture is largely based on the ARC-IT service package Personalized Traveler Information, with customizations to support local user needs.

Probe Vehicle Data (PVD) is data generated by vehicles. The collected traffic data can be used as input for operational traffic management (e.g., to determine the traffic speed, manage traffic flows by – for instance- alerting users in hot spots, where the danger of accidents accumulates), long term tactical/ strategic purposes (e.g. road maintenance planning) and for travelled information services. Also known as Floating Car Data (FCD).

This service architecture is largely based on the ARC-IT service package Vehicle-Based Traffic Surveillance, with customizations to support local user needs.

Urban Parking Availability (UPA) provides parking availability information and guidance for drivers to make informed choices about available parking places. This service aims to reduce congestion, time loss, pollution, and stress caused by cruising for parking.

This service architecture is largely based on the ARC-IT service package Loading Zone Management, with customizations to support local user needs.

Motorway Parking Availability (MPA) provides motorway parking availability information and guidance for truck drivers to make informed choices about available parking places. Existing solutions provide information about the location of parks, capacity, available equipment, facilities on site, security equipment and information about dangerous goods parking.

This service architecture is largely based on the ARC-IT service package Commercial Vehicle Parking, with customizations to support local user needs.