| Summary: | 碩士 === 國立成功大學 === 交通管理(科學)學系 === 84 === The State Route 9 between An-Shuo and Feng-Kang is desinged
with very low standers, and thus notable to provide enough
overtaking opportunities. The platoon grows easily and the
service leveldeteriorates quickly when the traffic increases
during holidays. The funding is limited. How tocost-
effectively improve this route becomes an important issue.
This study projects the traffic demand for next 20 years.
Traffic data are collected by V8 andportable vehicle
detectors. The traffic volume of each hour in a year is
obtained. The 30th highesthourly volume is about 1200 vph.
Three design hourly volume are studied. The improvement projects
of passing lanes are developedbased on three different
service levels, 70%, 75%, and 80% of following. The
measures ofeffectivenes include average travel time, average
following time,and average numbers of overtakings.Drafting the
passing-lanes projects by TRARR Simulation Model, the results
show that the mostcost-effective design is based on service
level of 80% of following and design hour volume of 800 vph.
This study obtains an cost effective improvement project for the
two-way two-lane highway. Theresults show that the improvemnt
based on the 30th highest hourly volume is overdesigned on
thestudied road. Key Word : the State Route 9, the 30th
Highest Volume, Passing Lane, TRARR, Design Hourly Volume
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