The growth of traffic congestion on many streets and highways is a major concern to travelers,rnadministrators, merchants, developers and the community at large. Its detrimental impacts inrnterms of longer journey times, higher fuel consumption, increased emissions of air pollutants,rngreater transport and other affected costs and changing investment decisions are increasinglyrnrecognized and felt across the country. Congestion reduces the effective accessibility ofrnresidents, activities and jobs resulting in lost opportunities for both the public and business. Thisrnissue is now days a great concern for Ethiopia and major cities in the country. Due to thisrnevaluation of traffic congestion and determination of level of service with the cause of trafficrncongestion is the first step.rnFrom these major cities in Ethiopia, Adama city is now affected by traffic congestion. In thisrnstudy the level of service and congestion measure using SIDRA intersection software and travelrntime approach respectively and cost of congestion analysis were done for only four mostrncongested intersections. Accordingly traffic volume, travel rate, travel speed, delay rate and ratiornand total segment delay were calculated. Finally correlation between traffic accident andrncongestion measures has been done.rnAfter the analysis there exist 29,189 vehicles per day on Posta-bet intersection only which isrnfound on the main highway. The total segment delay analysis shows 1067veh-min was lost onrnthe selected four approaches. And also on average about 39.6 million birr lost on one approachrnper year.rnKEY WORDS: Level of Service, Congestion Measures, SIDRA Intersection, HCM Manual