Special Edition A (Research Paper)
A study on secular change of traffic performance on interurban expressways
2019 Volume 5 Issue 2 Pages A_90-A_98
Details
2019 Volume 5 Issue 2 Pages A_90-A_98
It is known that the traffic performance of expressways changes depending on road conditions, driving environment conditions (weather conditions), and traffic conditions. Among them, the traffic conditions depend on the attributes of the driver and the performance of the car, and since there was a possibility that it changed over the years, the study analyzed the time series change of QV. As a result of comparing the QV figures of 39 points from 2003 to 2016, it was confirmed that the free flow velocity, the maximum traffic volume, and the queue discharge flow have declined over time at almost all points. Moreover, it realized that the maximum traffic volume decreased by about 7% on average and the average velocity decreased by 7 to 9%. From these results, we assumed the reason why the traffic performance declined over time is not the characteristic of the spot, but the change of the situation of the whole society, and we considered the factors.
