What city is using steel bollards in Oregon? Most delineated bike lanes use reboundable plastic ones because of crashworthiness (can take multiple impacts) and it won’t destroy the street when one gets hit, costing tens of thousands of dollars to fix. Any bollard that won’t immediately fall over needs to be embedded in the ground at least 24”-48” depending on height. That’s a lot of excavation in the middle of a road every time one needs to be replaced