This paper presents a new management system for traffic regulation devices in expressways. Since expressways play the basis and very important roles in modern society such as transportation of various resources, travel and so on, good traffic environments in expressways have to be maintained. In order to maintain or fix expressways, it is necessary to regulate and/or control the traffic and a large number of traffic regulation devices are used. In this paper, we show the management system for traffic regulation devices in expressways and the risk estimation function, the visualization software and so on in the proposed management system.