안전측면의 도로선형 설계일관성 평가기준 개발에 관한 연구

다국어 초록 (Multilingual Abstract)

This thesis focused on the research of a method to evaluate and improve alignment design consistency in the respect of safety. The design consistency depends on the conformance between drivers expectancy and highway geometry, so that the evaluation criteria for consistency should efficiently represent drivers behavioral characteristics. Under the conditions, this research included a new evaluation criteria development and an analysis on how to change evaluation criteria according to roadway alignments, to evaluate safety. The general study was performed with 3 steps basically. 1st stage analyzed a development of new evaluation criteria for alignment design consistency. In 2nd stage, the model, which meets the roadway geometric features, was developed with new evaluation criteria. Finally the model was validated and evaluation standard for the criteria were defined.
The newly developed evaluation criteria, spacing mean and speed deviation represented the drivers behavioral characteristics effectively on association area for a roadway segment alignment. Additionally the interrelationship with accident history data is also high. The existing operating speed evaluation criterion had the limit on the safety validation of roadway alignments association area because of lack of operating speed expectation method. However, new evaluation criteria model can supplement the limited existing criterion. The new evaluation criteria is intended for application by highway agencies to estimate the safety performance an existing or proposed roadway. The evaluation criteria model can be used to compare the anticipated safety performance of two or more geometric alternatives for a proposed highway improvement.