The purpose of this study is to determine the effective height of the noise barrier for the highway Sky-Line Project. It builds upon previous studies that analyzed soundproofing measures of roads and their surrounding residential areas. Although many soundproofing measures have been established along the road side, this study has the added distinction of considering residential noise prevention measures as well as the Soundproofing system itself. The process of this study is as follows. First, it took field surveys to check the existing physical states of the noise barrier,roads, and residences along the Kyung-bu highway in Seoul area. Second, this study conducted and analyzed surveys targeting road side residents, highway drivers, specialists in architecture, urban planning and design, landscape, road, noise, and transportation. Third, it calculated the optional height of the noise barrier for a comfortable driving environment and building the Sky-Line on the Highway, applying and checking its results on a case study. Finally, we verified the height on the Kyung-bu highway using the HW-NOISE simulation program.