An integrated intelligent intersection control system for preventing rear-end and angled crashes: System design and...

Area of Science:

• Intelligent Transportation Systems
• Traffic Engineering
• Road Safety

Background:

• The dynamic all-red extension (DARE) system effectively prevents angled crashes.
• Existing traffic control systems can lead to vehicles being trapped in dilemma zones during high-volume traffic.

Purpose of the Study:

• To enhance traffic safety by developing a system that mitigates rear-end collisions.
• To improve upon the dynamic all-red extension (DARE) system with a dynamic green extension (DGE) function.

Main Methods:

• The Integrated Intelligent Intersection control system (III-CS) was enhanced with a dynamic green extension (DGE) feature.
• DGE dynamically terminates green signals at the lowest risk interval for rear-end collisions.
• Implemented DGE within a customized time window for intersection coordination and used heuristic comparison for real-time risk prediction.

Main Results:

• The DARE system perfectly detected all red-light runners in post-deployment assessments.
• The DGE module achieved 66.7% control objective success in the first assessment, improving to 81.3% in the second.
• Observed reductions in vehicles trapped in dilemma zones and average deceleration rates.

Conclusions:

• The enhanced III-CS with DGE effectively reduces rear-end collision risks.
• The system demonstrates practical applicability and improved decision-making performance over time.
• The study confirms the system's positive impact on traffic flow and safety measures.