Traffic Diversion Signaling System for Intersection Capacity
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Solution Overview
Problem
Traditional four-phase traffic signal systems lead to excessive waiting times and congestion due to the need for vehicles to wait for multiple arms to clear, limiting traffic capacity and increasing idling times and air pollution.
Innovation Solution
Converting the traffic signal system to a two-phase system where two straight-through signals are open simultaneously, with prohibited direct turns in certain traffic systems, and using custom signals to direct vehicles to take U-turns, reducing conflicts and optimizing traffic flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a traditional four-phase traffic signal system is used, then traffic control safety is maintained, but waiting time increases and traffic capacity decreases
Solution Approach 1:
The patent segments the traditional four-phase signal cycle into two independent phases: Phase 1 allows straight-through traffic from opposite directions simultaneously, while Phase 2 handles turning traffic. This segmentation enables parallel processing of traffic flows that were previously sequential, reducing waiting time and increasing intersection throughput capacity.
Solution Approach 2:
The patent introduces dynamic traffic diversion signals that can switch between different operational modes based on real-time traffic conditions. The system dynamically adjusts signal phases and provides alternative routing guidance to turning vehicles, optimizing traffic flow patterns adaptively to maximize intersection capacity while minimizing delays.
2Object-affected harmful factors
If a traditional four-phase traffic signal system is used, then all traffic directions are served, but vehicle idling time increases and air pollution worsens
Solution Approach 1:
The patent ensures continuous movement of straight-through traffic by allowing opposite方向的 vehicles to pass simultaneously during Phase 1, eliminating the need for them to stop and wait. This continuous flow reduces idling time and associated emissions. Turning traffic is continuously guided through alternative routes via the custom signal provisions, preventing prolonged queuing and idling.
Solution Approach 2:
The patent provides preliminary routing guidance through custom signals that direct turning vehicles to take U-turns or alternative routes before reaching the intersection. This preliminary action prevents turning vehicles from blocking the main through-traffic flow, reducing overall idling time and emissions for all vehicles in the system.
3Ease of operation
If direct turns are allowed at intersections, then turning vehicle convenience is improved, but conflict with straight-through traffic increases
Solution Approach 1:
The patent introduces custom diversion signals as intermediaries that mediate between turning vehicles and straight-through traffic. These signals provide alternative routing instructions (U-turns, detours) that guide turning vehicles away from the main intersection conflict zones, eliminating direct conflicts while still accommodating turning traffic needs through safer alternative paths.
Data Source
AI summary
The present invention provides a traffic diversion system at a traffic intersection which comprises a traffic signal arrangement including a straight-through signal, a stop signal, a custom signal. The traffic diversion system at a traffic intersection further provides for two opposite straight-through signals to open at a time and direct right turn in a left-hand traffic system and a direct left turn in a right-hand traffic system is prohibited. According to an embodiment, the vehicle which intends to take right turn in a left-hand traffic system will be directed using custom signal to take a left turn and a ‘U’ turn. Similarly, in a right-hand traffic system, the vehicle which intends to take left turn will be directed to take a right turn and a ‘U’ turn upon the custom signal being enabled.