Priority Passage— GPS and ANPR-Based Vehicle Priority Management
Enable Authorized Vehicles to Pass Through Junctions Faster, More Safely, and Under Controlled Conditions
ISSD Priority Passage Management is a traffic management solution designed to enable ambulances, fire engines, police vehicles, public transport vehicles, municipal service vehicles, and specially authorized vehicles to pass through signalized junctions faster and more safely.
The system determines that a priority vehicle is approaching an junction using GPS location data or license plate information obtained from PTS/ANPR cameras. An appropriate passage plan is generated by evaluating the vehicle’s approach direction, distance from the junction, estimated arrival time, and the junction’s current signal status.
Priority Passage Management
Priority Passage Management is a traffic management mode that provides controlled signal priority to specific vehicle classes or authorized vehicles at signalized junctions.
The purpose of the system is not to provide an immediate green light to a priority vehicle under all conditions. Instead, the current signal phase, junction safety, pedestrian crossings, conflicting traffic movements, and downstream availability are evaluated together to create a safe passage plan.
As part of the priority passage process the current green phase can be extended, an early green phase can be initiated, the red-light duration can be shortened, the phase sequence can be changed safely, the junction can temporarily be switched to priority passage mode, and corridor-based priority can be applied across multiple junctions. After the vehicle passes, the junction returns to its previous operating mode in a controlled manner.
From detection to safe passage, step by step
Ecosystem Connection
Available priority interventions
A priority decision is not based solely on vehicle detection; the current phase, junction safety, and traffic conditions are evaluated together.
Key Features
Detection Methods and Application Areas
GPS, PTS/ANPR, and hybrid methods — used across scenarios from emergency vehicles to public transport corridors.
Advantages
ISSD Priority Passage Management accelerates the junction passage of authorized vehicles within traffic safety rules while protecting the safety of other road users.
Frequently Asked Questions
What does Priority Passage Management do? +
It temporarily adjusts junction signal plans to enable authorized vehicles to pass through signalized junctions faster, more safely, and under controlled conditions.
Which vehicles can receive priority? +
Priority can be provided to ambulances, fire engines, police vehicles, public transport vehicles, municipal service vehicles, disaster response vehicles, and specially authorized vehicles.
How does GPS-based priority work? +
The vehicle’s location, direction, and speed are evaluated. When the vehicle enters the defined approach distance, the junction is prepared for priority passage.
How far from the junction is the vehicle detected? +
Different distances can be configured according to project conditions. For example, the system can be configured with a 200-meter approach distance.
How does PTS/ANPR-based priority work? +
The vehicle license plate read by the camera is compared with the priority vehicle list. If a match is found, the priority process is initiated for the relevant junction.
Does the PTS/ANPR-based system require additional equipment in the vehicle? +
No. Since the vehicle is detected through a license plate recognition camera, additional in-vehicle equipment may not be required.
Can GPS and PTS/ANPR be used together? +
Yes. GPS provides advance notification of the vehicle’s approach, while PTS/ANPR physically verifies that the vehicle has entered the relevant corridor.
Is the priority vehicle given an immediate green signal? +
No. The current phase, yellow interval, all-red clearance time, pedestrian movements, and junction safety conditions are evaluated before a controlled phase transition is applied.
Can the system extend an existing green signal? +
Yes. If the priority vehicle’s approach is already green, the current green phase can be extended.
Can an early green signal be provided? +
Yes. After the current phase is completed safely, the priority vehicle’s approach can receive a green signal earlier than originally scheduled.
Can priority be provided to public transport vehicles? +
Yes. Priority can be provided to buses and BRT vehicles using GPS or license plate recognition data.
Is public transport priority applied to every vehicle? +
It can be applied unconditionally or conditionally, only to delayed vehicles or vehicles that meet defined criteria.
What happens if two priority vehicles arrive at the same time? +
Requests can be ranked according to vehicle type, urgency level, distance, estimated arrival time, and current signal conditions.
What happens to the junction after the vehicle passes? +
The junction returns in a controlled manner to its previous fixed-time, dynamic, coordinated, or scenario-based operating mode.
Can the system be operated manually? +
Yes. A traffic management center operator can manually initiate the priority process for a specific junction or route.
What is the role of MANGO-POINTR in the system? +
MANGO-POINTR processes license plate data received from PTS/ANPR cameras, checks the priority vehicle list, and transmits vehicle detection information to MANGO.
What is the main difference of Priority Passage Management? +
The solution can detect priority vehicles using both GPS and license plate recognition. When required, it combines these methods to provide early detection, field verification, and safe signal management within a single integrated structure.