| Summary: | 碩士 === 國立交通大學 === 土木工程研究所 === 83 === This research proposed a statistical approach to calibrate the
cost funtions for four fifferent types of streets by using the
data collected in Hsinchu City. Cost funtions are
classifyed into several categories accroding to their
application purposes.In addition to corresponding link traffic
volume,the proportion of turning movements,opposite traffic
flows and the cycle length of traffic signal are also taken
into account the effects of conflicting traffic and signal
control. Polynomial and exponential forms are considered in
this research.The model of cost function is first formulated as
the sum of two submodels: link travel time submodel
and intersection crossing time submodel, which are
calibrated separately.Then a single cost function is also
developed by constructing the relationship between the
total travel time and related variables.The results show
that explanatory ability of the sum of two separated
submodels are not significantly better than that of a single
model. Furthermore, the exponential cost function models
are preferred due to their characteristics to prevent the
appearance of negative travel time in prediction.
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