Page:UK Traffic Signs Manual - Chapter 8 - Part 2- Traffic Safety Measures and Signs for Road Works and Temporary Situations) - Operations 2009.pdf/203

 *marginal items exceed 1 in 5 consecutive items of equipment (e.g. traffic cones).

"Unacceptable" – devices in this category shall not be delivered to the site. When found in use, they should be replaced immediately.

Illustrations and associated descriptions are provided in paragraph A4.3.27 to assist assessment of condition of signs and delineators.

Temporary traffic management equipment inevitably becomes dirty during use and consequently becomes less conspicuous and legible, particularly at night and in adverse weather conditions. Therefore regular cleaning is essential. All items of temporary traffic management equipment should be cleaned prior to assessment of their condition and regularly cleaned throughout their time on site.

Signs and delineators should be assessed in relation to the following properties:
 * structural integrity;
 * sign face condition;
 * sign face colour; and
 * level of retroreflectivity.

A sign or delineator assessed as failing in any one of the above categories should be classified as "unacceptable".

A sign or delineator assessed as “marginal” in any one of the above categories, but passing in the others should be classified as "marginal".

A sign or delineator assessed as “marginal” in two or more categories should be classified as "unacceptable".

Signs of a suitable size with defects which affect recognition and legibility should be classed as "unacceptable".

Signs which are not mounted at the specified height should be classed as “unacceptable”.

The practice of mounting signs on unnecessarily long posts which project above the top of the sign is hazardous and "unacceptable".

Any sign or delineator which does not conform in every detail with the requirements in the Traffic Signs Regulations and General Directions is "unacceptable" regardless of its condition.

Structural integrity: Sign plates should be checked to ensure that they are adequately fixed to their frames. Where a frame, including an A-frame, is broken or deformed so that the sign cannot be adequately secured or the sign plate is not at the appropriate angle to the road surface, it should be classified as "unacceptable". 201