| Author | Aryal, Roshan |
| Call Number | AIT Thesis no. GT-87-33 |
| Subject(s) | Highway capacity--Thailand
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-87-33 |
| Abstract | The adequacy or sufficiency of existing highway networks in service
to current traffic will not be known until an accurate value of basic
capacity is used in capacity analysis procedures. This study was undertaken as a stepping-stone towards the determination of t he basic capacity
of uninterrupted flow highway facilities in Thailand.
The study involves investigating the characteristics of the actual
time headways (spacings) adopted by drivers in the traffic stream under
prevailing conditions. The reciprocal of the minimum time headways
adopted by passenger cars under capacity flow conditions has been used
in the estimation of the basic capacity. Comparisons are made between
capacity values based on 5-minute and 15-minute mean time headways. In
addition, comparisons of 5-minute and 15-minute equivalent-hourly flow
rates are made. The effects of the size of t he vehicles and the lane use
on the capacity have been investigated . Passenger car equivalents (PCEs)
for medium and large -sized vehicles have been calculated .
Results of the study indicated that the value of basic capacity was
2180 passenger cars per hour per lane at an average speed of 70 km/h (44
mph). Comparison with the equivalent-hourly flow rate approach yielded
a capacity value of 2160 passenger cars per hour per lane. The trend was
for the majority of large-sized vehicles to use the shoulder lane which
resulted in its reduced capacity . PCEs for medium and large-sized vehicles were obtained as 1.0 and 1.5, respectively |
| Year | 1988 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-87-33 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Yordphol Tanaboriboon; |
| Examination Committee(s) | Inamura, Hajime ;Kuroda, Koji; |
| Scholarship Donor(s) | The Royal Norwegian Government ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |