TY  - JOUR
PY  - 2010//
TI  - The estimation of a time-dependent OD trip table with vehicle trajectory samples
JO  - Transportation planning and technology
A1  - Kim, Hyunmyung
A1  - Jayakrishnan, R.
SP  - 747
EP  - 768
VL  - 33
IS  - 8
N2  - Abstract In this paper we discuss a dynamic origin?destination (OD) estimation problem that has been used for identifying time-dependent travel demand on a road network. Even though a dynamic OD table is an indispensable data input for executing a dynamic traffic assignment, it is difficult to construct using the conventional OD construction method such as the four-step model. For this reason, a direct estimation method based on field traffic data such as link traffic counts has been used. However, the method does not account for a logical relationship between a travel demand pattern and socioeconomic attributes. In addition, the OD estimation method cannot guarantee the reliability of estimated results since the OD estimation problem has a property named the ?underdetermined problem.? In order to overcome such a problem, the method developed in this paper makes use of vehicle trajectory samples with link traffic counts. The new method is applied to numerical examples and shows promising capability for identifying a temporal and spatial travel demand pattern.<p /> 
LA  - en
SN  - 0308-1060
UR  - http://dx.doi.org/10.1080/03081060.2010.536629
ID  - ref1
ER  -