ČSN P CEN/TS 17402

This document provides a background to the relevance of standards concerning mixed vendor environments in the context of urban-ITS. It describes key mixed vendor environments interfaces. It identifies existing open specifications for - sensor systems; - traffic control; - traffic information; - public transport information; - distributed C-ITS; - central systems. It provides common specifications of - sensor systems; - traffic control; - traffic information; - public transport information; - distributed C-ITS; - central systems. It describes openly plied proprietary standards and extant communications protocols that can be used in mixed vendor environments in the context of U-ITS.