Title: Chŏt'anso noksaek toro rŭl hyanghan oeguk ŭi toro chŏngch'aek ŭi pyŏnhwa wa uri nara toro chŏngch'aek ŭi sisachŏm
Subjects: Roads, Design and construction, Environmental aspects, Carbon monoxide, Highway law
Places: Korea (South)