Summary: | 碩士 === 國立成功大學 === 交通管理(科學)學系 === 84 === Congestion is nowadays one of the main problems on
freeway system.Reduction of congestion is a main objective
not only for insuring shortingand more reliable travel times,
but also in reducing its indirect consequenceson pollution and
fuel consumption thus improving the quality of life.
System limit control deserves the most efficient one that
has beenapproved to be appropriate for traffic congestion
conditions in foreigncountries. This paper accordingly tries
to develop a traffic density controller to eliminate the
traffic congestion. The macroscopic traffic model
adopted in this paper will be introducedto domestic people. A
traffic density controller is improved which is proposedfirst by
C.C.Chien , Y.Zhang, A.Stotsky. The traffic controller is
designed tooperate traffic system in a desired traffic
density to prevent the amplification of traffic congestion.
We proposed the density rules to set the density goals to
cooperate with the density controller. Finally, we
collected the traffic flow characteristics that are createdfrom
the traffic data on domestic freeway system to fit in the
adopted macroscopic traffic model. From the simulation
of difference traffic situation: close partly lane, close
fully lane, upper grade lane, we can see the traffic congestion
has been eliminated by the proposed density controller.
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