OBJECTIVES: This study aims to review a plan to reduce the shoulder width of a deformed round-trip two-lane highway with low traffic volume. METHODS: Installation of a passing lane on a round-trip two-lane (one-way one-lane) highway, and reduction of a shoulder for a round-trip four-lane highway. RESULTS : It is necessary to establish a design criterion for various highways, because the plan to reduce the lane or shoulder width of a highway with low traffic volume was analyzed to have an economic efficiency of 6.8~7.0%. CONCLUSIONS: It is necessary to seek for a plan to establish a national trunk net early by efficiently using the limited financial resources to cope with the traffic demand elastically.

• 김진섭(서울시립대학교 박사과정) | Kim, Jinsub
• 홍석기(서울시립대학교 박사과정) | Hong, Sukkee
• 박규영(삼보기술단 이사) | Park, Kuiyoung
• 박남식(삼보기술단 이사) | Park, Namsik 교신저자