| Summary: | 碩士 === 國立成功大學 === 交通管理(科學)學系 === 82 === The SUN YAT-SEN freeway of western Taiwan is getting sataurated
. The on-ramp metering, as general aknowledged, is an effective
measure to protect the service level of the freeway not to be
ting wrose. So the Ministry of Communications (MOC) put the
ramp metering into practice in order to improve the operational
perfor -mances of the freeway. Nevertheless MOC did not
consider those adjacent signalized surface intersections in the
beginning. There -fore the queue length of on-ramps is always
so long as to affect through traffic operations of adjacent
surface streets. Then near -by the regions soon become new
bottlenecks. For this reason, it is necessary to integrate the
ramp control with adjacent surface intersections signal
control. Besides, in order to assess the performances of the
coordinated control plans. this research modifies an urban
network micro- scopic traffic simulation model which was built
by Dr. L.C. Lee in 1992 and combined with newly collected
traffic data of both on -ramps and off-ramps and analyzes the
traffic characteristics and calibrates traffic parameters as
well. Then a new diamond inter- change microscopic traffic
simulation model has been established Finally, the optimal
fixed-time coordinated control plan has been determined by an
analysis of mathematical programming.In the following, a
simulation test of the coordinated control plan demonstrates
fairly good operational performances in both high- level and
middle-level flow situation.
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