| Author | Sourasay Phoumavong |
| Call Number | AIT Thesis no. GT-90-29 |
| Subject(s) | Traffic engineering--Laos--Vientiane--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of Requirement for the
Degree in Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-90-29 |
| Abstract | In transportation and landuse planning , the traffic demand and
travel pattern in certain areas can usually be predicted using an
0-D matrix. Many models have been developed to estimate an 0-D
matrix, however , unfortunately , these models cannot be applied in
many developing countries, due to their financial constraints,
since these models require enormous surveys and could be very
expensive. Therefore, it becomes necessary to seek a possible way
to develop a model that estimates an 0-D matrix without requiring
extensive surveys.
Recently, a Combined Incremental Distribution Assignment ·
(CIDA ) model was developed that enables a feed back process between
trip distribution and trip assignment to improve the existing O-D
matrix. The main purpose of this model is to update an existing
trip matrix using the available data. It was shown that t h is model
is applicable to update an existing 0-D matrix. However, it was
strongly recommended to carry o u t a validating of the model with
real data, because artificial data have been applied in that
research.
This study attempts to get an 0-D matrix for Vientiane, Laos,
updating the CIDA model and using real data from the actual study
area. Due to a lack of an existing 0-D matrix in developing
countries like Vientiane, the CIDA model is adopted to obtain a new
model using the trip generation through gravity model to get an
initial O-D matrix.
Using the mean of difference between the estimated and
observed traffic volumes the rate of accuracy was analyzed from the
present given road network.
The limited condition of the high variation ± 10 percent for
the comparison between estimated and observed traffic volumes on
links showed inefficient results by iterations for the model
because of the inadequate traffic count data. However , some links
can reach this condition between estimated and observed traffic
volumes. Although the results showed an unstable model, it could
serve as a theoretical basis for further research. |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-90-29 |
| 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) | Fukuda, Atsushi |
| Examination Committee(s) | Yordphol Tanaboriboon ;Mori, Hiroshi
|
| Scholarship Donor(s) | The Swedish International Development
Authority (SIDA ); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1991 |