Fakir Mohammed Ali Taufique
year, millions of dollars are lost in the global economy due to traffic
congestion. Long hours spent on congested roadways are draining away valuable
time, energy and money from the economy. Overcrowding of motorways represents
the greatest bottleneck in raising the economy’s productivity, hampering it
from further potential growth. Furthermore, additional social costs in term of
environmental pollution as well as medical expenses due to traffic congestion
related symptom, such as higher stress level experience by commuters, are
depleting the limited resources available to our society.
above discussion clearly indicates that delay should be reduced to increase
productivity and to minimize environmental pollution. The most economic way of
this delay reduction is to redesign the signal timing because this design is not
associated with spending money as well as consuming longer time. Only
readjustment of signal timing is sufficient for this purpose. Hence, to optimize
the signal timing for reducing delays has been taken as the main objective of
this study. An intersection has been chosen to achieve the goal of this study.
This selected intersection comprises Mirpur raod and Songsadbhaban road with 10
This study suggests that the new timing of the signal reduce total delay for all movements by 14.30% than the existing one. Particularly for movement 9 and movement 10 delays reduce most. It is found from the analysis that for movement 9 and movement 10 delays reduces 46.51% and 44.15% respectively from their existing conditions. The above figures clearly justify the improvement of the junction performance in new signal timing. Besides the signal timing, some other problems are also identified which also effects the operation of the intersection. Such types of problems arise from improper road marking, illegal parking, unplanned bus stoppage, illegal footpath usage etc. Photographs have been places to show these problems. Suggestions have been given to handle these problems by using scientific judgment and applying engineering knowledge.