本文件提供了确定交通信息与控制系统（TICS）和其他系统向道路车辆驾驶员提供的车载信息优先级的正式程序和两种替代方法（建议用户选择两种方法中适合其个人要求的一种）。它适用于车辆信息中的所有TIC，包括旅行者信息、导航、旅行和交通咨询、“黄页”信息、警告、系统状态、紧急呼叫系统信息和电子收费，以及来自非- TICS来源，如电话、警告和信号装置。虽然适用于允许自由生成消息的系统，但它既不提供如何使用从其程序中派生的消息的指导，也不适用于强制性或法律要求的消息。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document provides formal procedures and two, alternative, methods (users are advised to choose whichever of the two suits their individual requirements) for determining the priority of on-board messages presented to drivers of road vehicles by transport information and control systems (TICS) and other systems. It is applicable to the whole range of TICS in-vehicle messages, including traveller information, navigation, travel and traffic advisories, "yellow pages" information, warnings, systems status, emergency calling system information, and electronic toll/fee collection, as well as to messages from non-TICS sources such as telephone, warnings and telltales. Although applicable to systems that allow the free generation of messages, it neither provides guidance on how to use the messages deriving from its procedures nor is it applicable to mandatory or legally required messages.All current amendments available at time of purchase are included with the purchase of this document.