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Abstract:
A service level of highway is evaluated by average density or traffic flow rate of all lanes of relevant section.But when the service level of the road is lower, traffic flow rate by lane and traffic share rate by lane are different each other which results in lack of representativeness and thus analysis of service level by lane in consideration of actual traffic flow characteristics is required. Evaluation of service level of highway indicated in highway capacity manual uses the density as the effect scale without considering the number of lane. But the service level measured on a 2-lane or a wider highway cannot represent the traffic situation of relevant section because of different function of each lane as well as the difference in density by function of each lane when the traffic not reaches to the level of a full capacity. For such reason, its hard or impossible to evaluate the service quality by lane and provide the accurate information when using the evaluation method indicated in current road capacity manual. In this study, analysis was conducted on highway in Seoul area and as a result, traffic share by lane was found different each other, which means the need for improving the highway service level analysis methodology and more effective traffic management is expected when the traffic is smooth.
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