Abstract
The purpose of this research is the development of a concrete long distance navigation system of mobile robots in outdoor environment. We set up the research problem definition "A Autonomous Mobile Robot runs on the Sidewalk of 4km Loop-Street at Univ. of Tsukuba" and we have developed a method for autonomous running in the defined environment. In this paper, we explain the problem and basic structure of the navigation system. And then, the method of the side walk recognition using a laser range sensor and experimental results of side-walk detection and, the autonomous running on sidewalks, we also given.