Standard No.:	GA/T 508-2004
English Name:	Road traffic counting down display unit
Chinese Name:	道路交通信号倒计时显示器
Chinese Classification:	R87    Traffic control system
Professional Classification:	GA    Professional Standard - Security
Issued by:	Ministry of Public Security
Issued on:	2004-08-09
Implemented on:	2004-10-1
Status:	abolished
Superseded by:	GA/T 508-2014 Countdown display unit for traffic lights
Superseded on:	2015-1-1
Abolished on:	2015-01-01
Language:	English
File Format:	PDF
Word Count:	8000 words
Price(USD):	240.00
Delivery:	via email in 1~3 business day

本标准规定了道路交通信号倒计时显示器的分类与命名、要求、试验方法、检验规则、安装、标志、包装、运输和贮存。本标准适用于道路上使用的交通信号倒计时显示器。

Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Classifications and Designations
5 Requirements
6 Inspection Method
7 Inspection Rules
8 Basic Installation Requirements
9 Marks
10 Package, Transport and Storage
Appendix A (Normative) Communication Protocol of Communication Counting Down Display Unit