TRAFFIC DELAY AT PASUPATI OFF-RAMP TO TAMAN SARI SIGNALIZED INTERSECTION

• Main Author: Aldriano (NIM 25004028), Ronald
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/6709
• Institution: Institut Teknologi Bandung

ABSTRACT: <br /> <br /> <br /> <br /> <br /> <br /> <br /> Generally intersections contribute significantly to delays of traffic flows in urban networks. Studies about these delays are useful to improve the control of signalized intersections, besides those concerning capacities. The objective of the study is to evaluate traffic and geometric delays at the offramp of the Pasupati fly-over to the Taman Sari signalized intersection in Bandung. The off-ramp has a downgrade slope of about five percent, and the signal was controlled with four stages. Observations were recorded continuously for about three hours in the morning with two video cameras, and analyses were performed in the laboratory. Observations covered 255 meters between upstream location on the top of the ramp and downstream location beyond the stop line. Analyses results are compared with theoretical estimates by MKJI(1997)methodology. <br /> <br /> <br /> <br /> <br /> <br /> <br /> Analyses show that mean cycle time during the observation period is 176 seconds with a standard deviation of 9.1 seconds, with occasional long cycles of about five minutes that were excluded from the analysis. Arrival rates fluctuated between 657,1 and 1205,7 pcuph for the whole approach. Mean total delay is 1588.1 pcu.sec per cycle, with a mean delay of 108.5 sec/pcu. Mean total delay are 1493.8; 1032.5; 1158.9 veh.sec per cycle of light vehicles, heavy vehicles, and motorcycles are respectively 104.2; 107.3; and 80.9 sec/vehicle. Geometric delay is found to be 15.7 sec/pcu Estimates with MKJI methodology poduces a mean total delay of 2734,5 pcu.sec per cycle , with a mean total delay of 200,3 sec/ pcu. Observed delays are smaller than those estimated with MKJI methodology, and this is as expected. However, the large difference may be caused by the downgrade slope. The analyses use pcu values from MKJI. The study recommends to study pcu values on downgrade slopes, especially for motorcycles, to support the relationship between delays per vehicle and delays per pcu.