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http://dx.doi.org/10.12815/kits.2014.13.4.020

A Case Study of Panoramic Section Image Collection Method for Measuring Density - with matched images in the Seoul Beltway Sapaesan Tunnel -  

Park, Bumjin (한국건설기술연구원 SOC성능연구소 도로교통연구실)
Roh, Chang-Gyun (한국건설기술연구원 SOC성능연구소 도로교통연구실)
Kim, Jisoo (한국건설기술연구원 SOC성능연구소 도로교통연구실)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.13, no.4, 2014 , pp. 20-29 More about this Journal
Abstract
Density is applied both three major macroscopic traffic variables (traffic volume, speed, and density) and two measures of effectiveness (MOE) for level of service (LOS) on highway (density and V/C). Especially, it is known for the most accurate MOE on evaluating the LOS of highway. Despite such importance, there is a lack of study on density relatively than other variables for its difficulty of measurement. Existing density estimation methods have some limitations such as density values of same traffic flow vary with collecting time. In this study, we researched actual density measuring method with panoramic image, after each CCTV images in the Sapaesan Tunnel on Seoul Ring Expressway are matched into one panoramic image. Analysis through the Central Limit Theorem shows that density of 24 1 km-images, which means 24 second, applies traffic situation well. That is to say that reasonable density value regardless of collecting time, and practical density which represents actual traffic flow can be taken in case of measuring density by suggested collecting cycle.
Keywords
density; CCTV; matched image; Central Limit Theorem; collecting cycle;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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