Measuring travel time reliability and its influencing factors on the intercity motorway no. 7 in Thailand | |
| Author | Thanut Wattanasup |
| Call Number | AIT Thesis no.TE-20-07 |
| Subject(s) | Travel time (Traffic engineering)--Thailand--Measurement Traffic congestion --Thailand--Measurement |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Transportation Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Nowadays, Thailand’s road traffic is facing a heavy congestion with the limitation of network capacity and fluctuation in demand, the concept of travel time reliability was implemented to examine traffic performance. Travel time reliability (TTR) refers to a variability or repeatability of travel time. The purposes of this study are to assess link’s travel time reliability and corridor’s travel time reliability along Thailand Intercity Motorway No.7 and address the influencing factors that could affect travel time reliability. Using fifteen-travel time data received from located Bluetooth detectors to analyze the reliability. PV, BI and MI were selected in this study. The analysis of corridor travel time reliability reveals that travelling from Bangkok through Pattaya city on workday was more reliable than non-working day for both inbound and outbound direction. In addition, travel time reliability was a slightly different among every period of workday. The analysis of corridor travel time reliability also reveals that travelling toward outbound direction could experience higher variability rather than inbound direction. Quantitative comparison on link-by-link travel time reliability basis found that links from Tub Chang interchange to Srinakarin interchange was the most unreliable link especially during early morning on Monday. Link between Bang Bo interchange and Bang Pakong interchange should be given the priority for travelling toward outbound direction on holiday and weekend. Moreover, links between Suvarnabhumi interchange and Bang Bo interchange should be accounted since they demonstrated a low reliability on workday. Effect of traffic incidents on travel time reliability were examine through percentage difference and statistical analysis for both analysis of similarity and statistical modelling. The finding was that incidents related road accident caused the highest unreliability. Vehicle breakdown, roadwork and rain incident have a lower effect on travel time reliability. Tobit regression model displayed that travel time reliability was affected by traffic characteristic (traffic volume and proportion of truck), incident characteristics (duration of accident, lane blocked and multiple vehicles involved) and temporal effect (day of week) |
| Year | 2021 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Transportation Engineering (TE) |
| Chairperson(s) | Kunnawee Kanitpong |
| Examination Committee(s) | Piyapong Jiwattanakulpaisarn;Ampol Karoonsoontawong |
| Scholarship Donor(s) | His Majesty the King’s Scholarships (Thailand) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2021 |