This paper investigates design elements and use characteristics of neighborhood bike paths, which applied "the road-diet method" and became a public trend in promoting bike way in old residential areas of Seoul. The goal of this paper is to draw planning implications based on research evidences for future bike way policies and planning. With the case of the Mangwon-ro bike paths, which was completed in June 2008, this paper conducted resident surveys to find out what has changed after its establishment. As results, this paper suggests the conclusions as follows: 1) The establishment of the Mangwon-ro bike paths did contribute to the increase of the bike use rate; 2) The residents utilized the bike paths in moving around within the neighborhood mainly for daily lives, rather than for commuting; 3) As for the elements contributing to the use rate of the bike paths, those such as two-way arrangement, large cross-roads, night lighting and illumination are positively recognized, while those such as clashes with other transportation modes, proper bike stations, and distances between facilities are negatively recognized. These findings, along with other use characteristics differentiated by various user groups, provide meaningful references for future bike way planning with "road-diet methods" in old residential neighborhoods of Seoul.