| Summary: | In 2014, the Yogyakarta Communication of the Services plans to change the
traffic flow in C. Simanjuntak Street from two-way to one-way which will start
from the intersection of Mirota Kampus to the south. However, the plan to change
the one-way on C.Simanjuntak Street will have an impact on the regulation of
traffic signals at the intersection of Mirota Kampus so it needs to be reset as
optimal as possible so not to cause congestion at the other intersections, especially
the intersection of Pharmacy UGM and UGM roundabout.
Primary data collection is done by measuring the geometric conditions, traffic
volume survey, saturated flow field, and the queue length field is further
processed by MKJI 1997 method to get the level of performance of the
intersection. Furthermore, the traffic volume data compared with the prediction of
the primary secondary data has been studied by the Traffic Management Study
Area of C. Simanjuntak and the surrounding from the Yogyakarta Communication
of the Services (2010) when the C. Simanjuntak Street be a one-way street.
Comparative analysis was conducted in order to obtain a more predictive
approach to the future conditions.
Calculation results indicate that the existing condition of the intersection of
Mirota Kampus already very saturated because of the degree of saturation at each
approach has achieved � 0.85. Reduction in the number of phase with the direct
operation of the rules turn left (LTOR) in northern approach is the best
anticipation if a one-way system on C. Simanjuntak Street applied. It is shown
from the reduced cycle time from 171 seconds to 62 seconds and the degree of
saturation at each of approach <0.85. In addition, the intersection delay of 172.03
sec/pcu be only 22.55 sec/pcu so that the level of performance of the intersection
after the one-way system applied on C. Simanjuntak Street would be more
optimal.
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