Signalized intersection analysis and design on micro-computer | |
| Author | Lejano, Jose Boyd |
| Call Number | AIT Thesis no. GT-88-31 |
| Subject(s) | Traffic engineering--Thailand--Bangkok Microcomputers |
| Note | A Thesis Submitted in Partial Fulfillment of the Requirements for t he Degree in Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-88-31 |
| Abstract | In today's age of computerization, a computer aided package for optimizing the traffic signal setting at an intersection is a necessity. The package SICAP (Signalized Intersection Computer Aided Package) was conceived to help ease the problems caused by t h e interlocking of traffic at a signalized intersection by presenting different phasing schemes and signal timings. Two methods for computing t h e cycle time were adapted for the package, the Webster (UK) and the Drew (US) techniques. Delays, fuel consumptions and queue lengths were also tackled to make the package more comprehensive. Since this package is user-friendly and fully interactive with the user, it can be easily utilized even though the user is not a traffic engineer. Also, a graphics feature was provided as t he highlight of the package. The input and the output formats were likewise provided with a graphic al feature to enhance understanding. The package can also handle any types of isolated intersection such as a three-way intersection or a four-way intersection and from any orientations of traffic movements such as one - way or t wo-way traffics. Two intersections in Bangkok were used as sample real world condition s for input to the package, Klongton intersection for t he four-way intersection and Kasetsart intersection for the three-way intersection. Th ese two intersections yielded an over -saturation situation. Over-saturation occurs when the traffic flow at the intersection exceeds its capacity. However, after some modifications on the geometric configurations of the intersections, the package came up with results that will improve their signalization systems. Consequently, the cycle time of 304 seconds obtained from actual recording at Klongton intersection was reduced to tolerable values of 143 seconds and 71 seconds by Webster a nd Drew methods, respectively. Consequently, the delay, fuel consumption and queue length were r educed significantly. By using the Webster method, these values were found to be 72.27 seconds per vehicle, 9.67 liters per h our and 6.68 vehicles per lane , respectively. Drew's method on the other hand resulted to the values of 30.43 seconds per vehicle, 4.43 liters per hour a nd 3.01 vehicles per lane for t h e delay, fuel consumption and queue length, respectively. |
| Year | 1989 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-88-31 |
| 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) | Kuroda, Koji ;Inamura, Hajime |
| Scholarship Donor(s) | The Government of Australia ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |