scope:

Specifies requirements for road traffic signal systems, including their development, design, installation and maintenance. It covers road traffic signals systems as far as electrical specifications are concerned and protection against dangerous signal conditions as specified by CEN/TC 226 as result of a failure of electrical components of a raoad traffic signal systems. Is applicable to road traffic signal systems and devices including for example signal heads, signalling devices and traffic signs, controller and housing, supports, interconnections, links, traffic detectors, monitoring equipment, electricl supply. The road traffic signal systems operating in conjunction with other systems e.g. public lighting, railway systems shall also comply with the respective standard and shall not reduce the safety of all the equipment. Portable traffic signal systems are not covered by this standard.