| Summary: | 碩士 === 國立臺灣大學 === 土木工程研究所 === 82 === Owing to the heavy recurrent congestion of urban freeway,an
analysis procedure for integrated ramp control of freeway
corri- dor is established in this study. At first, estimating
the O-D pattern by using FREQ10PE model and analyzing the
characterist- ics of urban freeway. This study regards the
interaction of mainlane and surface roads as the
qualitative base of multi- ramps metering control. This study
considers the performance of both mainlane and parallel surface
aterial and different traffic conditions in peak and off-peak
hours. Within the study, the condition of short trips
diversion is analyzed by using equili- brium assignment.
Moreover, FREQ10PE model is utilized to get optimal metering
rates and evaluate the performance of the whole system. A case
study of Sun Yat-Sen Freeway in Taipei Metropolitan Area has
been presented. The ramp metering control strategies of
traditional and the proposed methodology are compared in
this study. According to the results, adopting the multi-
ramps me- tering control could make the average travel speed
of mainlane higher and more stable ,but the whole system''s
performance depe- nds on the ramp control strategy and control
object. The results show that the performance of mainlane is
over-emphasized in tra- ditional methodology, so the
performance of ramps and surface roads get worse. On the other
hand, the positive performance of the corridor system and the
less negative impacts to surface roads can be gotten by
using the integrated ramp control stra- tegy of the proposed
methodology. Therefore, the effectiveness of the proposed
methodology has also been evaluted.
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