# Commission Decision of 14 November 2012 concerning the technical specification for interoperability relating to the ‘operation and traffic management’ subsystem of the rail system in the European Union and amending Decision 2007/756/EC (notified under document C(2012) 8075) (Text with EEA relevance) (2012/757/EU), Division 4.2.2.8: Requirements for signal and line-side marker sighting

Extent: E+W+S+N.I.

The driver must be able to observe signals and line-side markers, and they must be observable by the driver whenever applicable. The same applies for other types of line-side signs if they are safety-related.
Therefore, signals, line-side markers, signs and information boards must be designed and positioned in such a consistent way to facilitate this. Issues that must be taken into account include:
that they are suitably sited so that train headlights allow the driver to read the information,
suitability and intensity of lighting, where required to illuminate the information,
where retro-reflectivity is employed, the reflective properties of the material used are in compliance with appropriate specifications and the signs are fabricated so that train headlights easily allow the driver to read the information.
Driving cabs must be designed in such a consistent way that the driver is able to easily see the information displayed to him.

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Source: https://www.legislation.gov.uk/eudn/2012/757/annex/I/division/4/division/4.2/division/4.2.2/division/4.2.2.8 (the official version)
Page: https://openlegislation.uk/eu-decision-2012-757/annex-I/division-4/division-4.2/division-4.2.2/division-4.2.2.8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.