1) Confines

“ The confines of bollards and posts are determined في agreement with the توضيح contrary و يأخذ into account ال following interpretations
• the height يكون measured from the face of the path;
• the overall range, ال lowest of the confines, or the المحيط نكون measured in the vertical aeroplane.
ال height must يكون at least 50cm.However, إنه range أو المحيط must يكون على الأقل 28 cm, If the bollard or post is 50 cm عالي.
ما يزال, ال range or minimum المحيط of its base يكون equally commensurable to its height, If the bollard or post is المتقدمة من 50 cm.
إلى عن على caseHow high should bollards light be
• the height of the post is1.10 m at the حقا least for a المحيط أو range من 6 cm;
• a bollard with a range أو المحيط من 21 cm is at least 60 cm عالي”

2) Contraste

Differ يكون useful for the visually bloodied, helping هم more perceive road cabinetwork.
As a جنرال لواء rule, ال بند من road cabinetwork should differ explosively with its immediate surroundings.
Exemplifications
• A خفيفة-coloured bollard contrasts with a dark أرض
• A dark bollard contrasts with a خفيفة-coloured structure
ما يزال, ال body of the bollard or post should differ explosively with the top over a height من 100 mm in the most common cases, If there isn’;t enough discrepancy with the surroundings.