In Korea, a vehicle overtaking is prohibited by the law in tunnel and bridge sections where a road section has lanes with solid line. However, this regulation has some problems in terms of traffic operation and safety. So, it is necessary to find a way to improve the lane operation in tunnel and bridge sections. The objective of this research is to propose a systematical logic and specific standards to draw up an improvement of lane operation in tunnel and bridge sections on expressways. For that purpose, the status of lane operation in tunnel and bridge sections on both of the domestic and the abroad expressways and the improvement effect of the lane management were analyzed and, followed by it, the ways to improve lane management were suggested. In the comparison of the number of traffic accidents between road sections and tunnel sections, it was resulted that the number of traffic accidents per unit length (1km) of tunnel sections was lower than that of road sections. In addition, in the comparison of the fatality of traffic accidents, the fatality of tunnel sections on expressways was lower than that of other road tunnel sections. Through the analysis, it was resulted that there was a low correlation between the permission of the lane change in tunnel sections and the increase of traffic accidents. Moreover, in the comparing the traffic accidents between expressway tunnels and other road tunnels as well as between road sections and tunnel sections on expressways, there was no significant difference in safety between the solid line sections and the dotted sections. As a result of the analysis on the pilot operation section, it was expected that there would be no serious problems even if the permission of the lane change in tunnel and bridge sections was implemented, because the difference between in the existing solid-line sections and the pilot dotted line sections in terms of the lane change rate, the traffic characteristic, and the traffic accidents is not significant. Therefore, it needs to improve the current solid-line lane operation forbidding the lane change in tunnel and bridge sections. It is necessary to allow the lane change in tunnel and bridge sections with an appropriate level of facility conditions. In the long run, as in the cases of foreign countries, it is require to establish a principle to permit the lane change in tunnel and bridge sections. However, if necessary, it is need to consider the prohibition of the lane change in some tunnel sections by the engineering judgment. Allowing the lane change of the car in tunnel sections is not only merely a change of the lane operating method but also it is expected to be an important opportunity to increase the adherence of the driver to the laws and regulations and to change the drive culture by introducing a consistent traffic regulation.

본 연구에서는 비용예측모델과 성능예측모델을 이용하여 네트워크 레벨에서 향후 교량과 터널 유지관리 비용과 성능을 예측할 수 있는 방법론은 개발하였다. 현재 국내의 시설물 유지관리 관련 연구는 대부분 단일 시설물에 집중되어 있어 도로망차원의 네트워크 레벨 분석 에는 적용하기 어렵다. 따라서 시설물군 단위로 유지관리 계획을 수립해야하는 실무주체에게 유의한 정보를 제공하지 못하고 있는 실정이다. 본 연구의 예측모델은 시설물의 성능에 현재 시특법에 의해 평가하고 있는 상태외 사용성과 기능성을 포함하였으며, 기본 분석과 확장 분석을 통해 각 시설물의 조치 시기와 연간 예산을 추정할 수 있다. 또한 사례 분석을 통해 기술적 타당성을 검증하였다. 본 연구의 방법론이 활성화된 다면 다수의 시설물의 비용대비 미래 성능을 파악할 수 있으며, 효과적인 중장기 예산 수립을 할 수 있을 것으로 판단된다.

The Goal of research is that decision-making in bridge and tunnel maintenance were estimated by prediction models of condition and value engineering. We developed the software that can be calculated asset values and it’s condition depending on budget scenario by the bridge and tunnel prediction model. It can be determined an optimal budget of facilities and it’s values using prediction model of cost and condition.