A variety of road facility management systems, such as the highway management system, pavement management system, which are systems for the site itself, and systems for the various road accessories suchas road signs and street lamp, haverecently been established to systematically manage road facilities. This has increased the effectiveness of the management of road structures;however, theyoften cause statistical inaccuracies such as information entry, interworking, and other errors, or causes various problems in use. The same problem existswith the road sign management system, which manages approximately170,000 road signs in Korea. The management of road signs based on the road is necessary to address problems such as incorrect entry error of the most basic road information, limitations inusability due to simple location identification of road signs, and inaccuracies in analyticalstatistics of structures. A method of applyingthe linear referencing system technology to extend to road alignment-based systems and to effectively manage road signs is proposed herein. Through this management technique, which is controlled by connecting road signs based on road alignment, data can be reliably secured by reducing errors in road sign entry and management. It is also easy to detect and correct information errors on connected road signs if the information in the road alignment changes. If the road alignment changes, it is expected that the road signs will be automatically calibrated and that the road signs will be connected to the wrong road to prevent managed errors.