标志管理客户端是用来与标志管理系统服务器配合工作，可以进行标志信息的浏览，以及非法标志牌和故障标志牌的上报。Sign Management Client is a free app. It can connect to the Sign Mangement System Sever for information. It could view the signs that are authorized to access. It also could add the illegal signs, and upload failed signs.