Analysis Of Highway Traffic-Jam Behavior Through Velocity Detector Data

• Main Authors: Yi-Ju Liang, 梁依儒
• Other Authors: Machine Hsie
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/44280772148004120210

碩士 === 國立中興大學 === 土木工程學系所 === 104 === Domestic ITS (Intelligent Transportation System) is an advanced equipment that designed for shortening the traveling time between places by providing faster and smoother ways. Traffic-Jam has been improved compared to the past，but it is still happening. The main reasons for it are that traffic flow and vehicles speed change rapidly but the feedback of the changes are always one step behind. Traffic Control Center judge whether the traffic is jammed or not often just base on the Occupancy. According to occupancy and main line’s traffic flow to calculate that how much cars can enter the main line by using Ramp Metering System. And the data doesn’t include the reasons of a traffic jam or how the traffic can be smoothed. The analysis we use here is based on detecting vehicles flow per minute. By these data, we can probe into the pattern of traffic jam and the way to smooth traffic flow. The result shows that both patterns are neither linearity nor collinearity. It reveals that vehicles speeds are obviously different base on each traffic pattern even they are the same occupancy and traffic flow. The future of Traffic Control Center should have known that before using Ramp Metering System to control the traffic flow, including the traffic pattern as the main factor, then target on the traffic speed that main line is required, according to the immediate traffic pattern to adjust the Ramp Metering, we can shorten the travel time and upgrade the level of service of the road