| Title |
Evaluation of Travel Time Reliability using Daily Traffic Volumes |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.5.0631 |
| Keywords |
통행시간; 신뢰도; 일교통량; 점추정방법; 도로타당성 Travel time; Reliability; Daily traffic; Point estimate method (PEM); Highway feasibility |
| Abstract |
This paper is to introduce methodologies of travel time reliability evaluation using daily traffic volumes. The methodologies include desirable speed concept, the relation between averaged daily speeds and daily traffic volumes, the standardized way in integration of travel time deviations obtained from continuous highway sections. The study began with traffic data collection from a freeway line with long lasting congestion. And then, provided establishment of the relation between averaged daily speeds and daily traffic volumes, and usability of Point estimate method (PEM) to integrate travel time deviations of sections. Based on the relation between averaged daily speeds and daily traffic volumes, it is identified that travel time reliability begins to decrease around LOS (Level of Service) C even before LOS D or F. It may be concluded that travel time reliability could be evaluated based on daily traffic volumes in highway sections using standardized PEM. The methodologies introduced in the paper, could be useful in practicing evaluation of travel time reliability during the works of highway operation or highway planning. |