1) Confines

“ The confines of bollards and posts are determined i agreement with the illustration contrary och ta into account de following interpretations
• the height är measured from the face of the path;
• the overall range, de lowest of the confines, or the periphery är measured in the vertical aeroplane.
De height must vara at least 50cm.However, dess range eller periphery must vara minst 28 centimeter, If the bollard or post is 50 centimeter hög.
Still, de range or minimum periphery of its base är equally commensurable to its height, If the bollard or post is Avancerad än 50 centimeter.
För caseHow high should bollards light be
• the height of the post is1.10 m at the sannerligen least for a periphery eller range av 6 centimeter;
• a bollard with a range eller periphery av 21 cm is at least 60 centimeter hög”

2) Contraste

Differ är useful for the visually bloodied, helping dem more perceive road cabinetwork.
As a allmän rule, de Artikel av road cabinetwork should differ explosively with its immediate surroundings.
Exemplifications
• A ljus-coloured bollard contrasts with a dark jord
• A dark bollard contrasts with a ljus-coloured structure
Still, de body of the bollard or post should differ explosively with the top over a height av 100 mm in the most common cases, If there isn’;t enough discrepancy with the surroundings.