Bollards can define space, control vehicles and people, and protect from unwelcome traffic. They also can be used for decorating and wayfinding.As security awareness increases, bollards are being used to resist threats such as ram-raid burglaries, and even potential terrorist activity. External bollards provide one of the most weather-exposed uses of timber.They are rarely maintained and yet are expected to have long service lives.The selection of appropriately durable timber species and grade are important – not only for theweather-exposed portion of bollards, but also that buried in-ground.This guide details the considerations for better bollard design and specification so that common poor construction and inferior product substitution can be avoided.Bollards are a permeable barrier used to control and guide pedestrians and vehicles. Their form and layout mediate the transition across both physical and perceptual boundaries. This control can be used to minimise conflict between differenttraffic types.Bollards offer safety and refuge as a physical barrier, and provide visual clues to deliver a range of functions:- traffic flow – visually define road and path boundaries- pedestrian control – chains between bollards can create a form of balustrade- vehicle control – can be closely spaced to restrict vehicle movement- impact protection – act as security barriers to protect infrastructure from accidental and deliberate impact- guidance – can include signage and wayfinding functions- decoration – provide sculptural and memorial points of interest.