Traffic Status Determination Using Holding Phase Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for ascertaining traffic status data are not reliable in distinguishing between flowing traffic and congestion, particularly in urban areas where holding times are frequent due to traffic signals and intersections, leading to incorrect recognition of congestion.
Innovation Solution
A method that acquires vehicle speed at predefined intervals, assigns speeds to different ranges, and adjusts counts to differentiate between flowing traffic and congestion, with a non-consideration period for holding phases to filter out non-congestion holding times, using predefined or dynamically adjusted speed thresholds and non-consideration numbers based on location and traffic influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vehicle speed is monitored continuously to determine traffic status, then traffic status recognition precision is improved, but holding phases caused by traffic signals and intersections are incorrectly recognized as congestion
Solution Approach 1:
The patent segments the speed monitoring process by introducing a holding phase detection mechanism that separates normal stopping events (at traffic signals and intersections) from actual congestion. The system divides speed data into different categories: holding phases where the vehicle stops temporarily at controlled locations, and congestion where the vehicle stops due to traffic conditions. This segmentation allows the system to filter out false positives from holding phases while maintaining accurate congestion detection.
2Adaptability or versatility
If speed thresholds are used to differentiate flowing traffic from congestion, then traffic status classification is improved, but frequent holding times in urban regions are misclassified as congestion
Solution Approach 1:
The patent introduces an intermediary mechanism - the holding phase detector - that acts as a mediator between speed threshold evaluation and congestion classification. When the vehicle speed falls below the threshold, instead of directly classifying it as congestion, the system first checks whether the vehicle is in a holding phase at a traffic signal or intersection. This intermediary check prevents misclassification of normal stopping events as congestion while maintaining the effectiveness of speed threshold-based classification.
3Quantity of substance
If all acquired speed data is considered for traffic status determination, then data completeness is improved, but false congestion recognition increases due to non-congestion holding times
Solution Approach 1:
The patent extracts and removes holding phase events from the speed data set used for congestion determination. The holding phase detector identifies periods when the vehicle stops at traffic signals or intersections and extracts these specific data points from the overall speed monitoring data. By taking out these non-congestion holding times, the system maintains complete speed data recording for analysis purposes while excluding false-positive events from the congestion classification process, thereby improving determination reliability.
Data Source
AI summary
To ascertain traffic status data, a speed of a vehicle is acquired multiple times at predefined time intervals. The respective acquired speed is assigned to a first speed range when the respective acquired speed of the vehicle is greater than at least one predefined speed threshold. Furthermore, a first count is increased when the respective acquired speed is assigned to the first speed range. The respective acquired speed is assigned to a second speed range when the respective acquired speed of the vehicle is less than the at least one speed threshold, and a second count is increased when the respective acquired speed is assigned to the second speed range, wherein a holding phase is recognized while the respective acquired speed has a speed value in a predefined range around the value zero once or multiple times in succession. During the recognized holding phase, the acquired speeds having the speed value in the predefined range around the value zero are not taken into consideration for a predefined non-consideration number of speed acquisition periods with respect to the adaptation of the second count.