page_title: Curb extension
hierarchical_section_title: Curb extension
caption_attribution_description: Traffic calming measures (road narrowing and speed bumps) in Yate, near Bristol, England. The speed bumps are reddish, and the narrowed area is blacker than the old pavement. Taken by Adrian Pingstone and released to the public domain.
context_page_description: A curb extension is a traffic calming measure which widens the sidewalk for a short distance. This reduces the crossing distance and allowing pedestrians and drivers to see each other when parked vehicles would otherwise block visibility.
  A curb extension is formed by an angled narrowing of the roadway and a widening of the sidewalk. This is often accompanied by an area of enhanced restrictions and the appropriate visual reinforcement. This is achieved using painted road markings, barriers, bollards, or the addition of pavement or street furniture.
  Curb extensions are often used in combination with other traffic calming measures such as chicanes, speed bumps, or rumble strips, and are frequently sited to protect formal pedestrian crossings. In these cases the "squeeze" effect of the narrowed roadway shortens the exposed distance pedestrians must walk.
context_section_description: A curb extension (or also neckdown, kerb extension, bulb-out, bump-out, kerb build-out, nib, elephant ear, curb bulge, curb bulb, or blister)  is a traffic calming measure which widens the sidewalk for a short distance. This reduces the crossing distance and allowing pedestrians and drivers to see each other when parked vehicles would otherwise block visibility.
  A curb extension is formed by an angled narrowing of the roadway and a widening of the sidewalk. This is often accompanied by an area of enhanced restrictions (such as a "no stopping" or "no parking" zone) and the appropriate visual reinforcement. This is achieved using painted road markings (e.g. lines, coloured areas, or chevrons), barriers, bollards, or the addition of pavement or street furniture (e.g. planters, street lights, or benches).
  Curb extensions are often used in combination with other traffic calming measures such as chicanes, speed bumps, or rumble strips, and are frequently sited to protect formal pedestrian crossings. In these cases the "squeeze" effect of the narrowed roadway shortens the exposed distance pedestrians must walk.
caption: A curb extension marked by darkened tarmac and black posts
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