Evaluation of Traffic Congestion and Level of Service at Major Intersections in Adama City
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Date
2015-08
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Addis Ababa University
Abstract
The growth of traffic congestion on many streets and highways is a major concern to travelers,
administrators, merchants, developers and the community at large. Its detrimental impacts in
terms of longer journey times, higher fuel consumption, increased emissions of air pollutants,
greater transport and other affected costs and changing investment decisions are increasingly
recognized and felt across the country. Congestion reduces the effective accessibility of
residents, activities and jobs resulting in lost opportunities for both the public and business. This
issue is now days a great concern for Ethiopia and major cities in the country. Due to this
evaluation of traffic congestion and determination of level of service with the cause of traffic
congestion is the first step.
From these major cities in Ethiopia, Adama city is now affected by traffic congestion. In this
study the level of service and congestion measure using SIDRA intersection software and travel
time approach respectively and cost of congestion analysis were done for only four most
congested intersections. Accordingly traffic volume, travel rate, travel speed, delay rate and ratio
and total segment delay were calculated. Finally correlation between traffic accident and
congestion measures has been done.
After the analysis there exist 29,189 vehicles per day on Posta-bet intersection only which is
found on the main highway. The total segment delay analysis shows 1067veh-min was lost on
the selected four approaches. And also on average about 39.6 million birr lost on one approach
per year.
KEY WORDS: Level of Service, Congestion Measures, SIDRA Intersection, HCM Manual
Description
Keywords
Level of Service, Congestion Measures, SIDRA Intersection, HCM Manual