Pedestrian Detection via Mobile Device Location Data
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Solution Overview
Problem
Current traffic management systems struggle to effectively detect and prioritize pedestrians and smaller vehicles, such as bicycles, at intersections, leading to inefficient traffic flow and potential safety hazards, as they often lack the necessary metal content to trigger in-ground detectors or have limited access to demand buttons.
Innovation Solution
A detection system that uses mobile communication devices to transmit the location and direction of travel to a central server, which communicates with traffic signal controllers to adjust timing phases and prioritize travelers, ensuring smoother passage for all types of vehicles and pedestrians.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If in-ground detectors are used to detect vehicles at intersections, then motor vehicle detection is effective, but pedestrians and smaller vehicles (such as bicycles) cannot be detected because they lack sufficient metal content to trigger the detectors
Solution Approach 1:
The patent employs multiple detection methods (in-ground detectors, video detectors, and demand buttons) within a single traffic control system. Each method serves different detection needs: in-ground detectors for metal-containing vehicles, video detectors for visual identification of various vehicle types including bicycles and pedestrians, and demand buttons for pedestrian-initiated detection. This multi-functional approach allows the system to detect all types of travelers regardless of their metal content.
Solution Approach 2:
The patent introduces video detectors as an intermediary detection mechanism that bridges the gap between in-ground detectors (which require metal content) and the need to detect all vehicle types. Video detectors capture images and analyze them to identify vehicles, pedestrians, and bicycles without requiring metal content, thereby mediating the detection process for objects that in-ground detectors cannot detect.
2Ease of operation
If demand buttons are provided for pedestrian detection, then pedestrians can request signal changes, but bicyclists and other small vehicles have limited access to these buttons
Solution Approach 1:
The patent positions video detectors as an intermediary that detects bicyclists and pedestrians approaching intersections without requiring them to physically interact with demand buttons. The video detection system captures images of travelers in the crosswalk area and automatically processes their detection requests, serving as a mediator between the traveler's presence and the signal control system.
Solution Approach 2:
The system enables bicyclists and pedestrians to self-initiate detection through their presence in the detection zone. When a bicyclist or pedestrian enters the video detector's field of view in the crosswalk area, the system automatically detects them and processes their detection request without requiring manual button pressing, allowing them to service their own detection needs.
3Productivity
If traditional detection systems are used, then motor vehicle traffic flow is managed efficiently, but pedestrians and bicyclists experience delays and safety hazards due to inability to trigger signal changes
Solution Approach 1:
The patent implements a feedback mechanism where video detectors continuously monitor the crosswalk area and provide real-time information about pedestrians and bicyclists to the traffic controller. When travelers are detected in the crosswalk zone, the system receives feedback and automatically adjusts signal timing to provide safe passage, creating a closed-loop control system that responds to actual conditions rather than following fixed timing patterns.
Solution Approach 2:
The system performs preliminary detection of pedestrians and bicyclists in the approach area before they reach the crosswalk. By detecting travelers early and preparing signal changes in advance, the system ensures that when these vulnerable road users reach the intersection, the signal is already configured to provide safe passage, preventing last-minute conflicts and enhancing safety.
Data Source
AI summary
A system and method that enables pedestrians or individuals on smaller conveyances to communicate their location and direction of travel to signal light controllers at an intersection, enables traffic networks to receive this communication and output the detected data to the corresponding intersection traffic-signal controller to allow for individuals not in standard motor vehicles to be detected by traffic detection systems.