page_title: Speed bump
section_title: Speed tables
hierarchical_section_title: Speed bump / Speed tables
caption_attribution_description: English: A kerb extension in Nuffield Street, Newmarket, Auckland, New Zealand.
context_page_description: Speed bumps are the common name for a family of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Variations include the speed hump, speed cushion, and speed table.
  The use of vertical deflection devices is widespread around the world, and they are most commonly found to enforce a low speed limit, under 40 km/h or lower.
  Although speed bumps are effective in keeping vehicle speeds down, their use is sometimes controversial—as they can increase traffic noise, may damage vehicles if traversed at too great a speed, and slow emergency vehicles. Poorly-designed speed bumps that stand too tall or with too-sharp an angle can be disruptive for drivers, and may be difficult to navigate for vehicles with low ground clearance, even at very low speeds. Many sports cars have this problem with such speed bumps. Speed bumps can also pose serious hazards to motorcyclists and bicyclists if they are not clearly visible, though in some cases a small cut across the bump allows those vehicles to traverse without impediment. Speed bumps cost $50–200 and may need replacement over time due to wear.
context_section_description: A speed table (or flat top hump or raised pedestrian crossing)  is designed as a long speed hump with a flat section in the middle. Speed tables are generally long enough for the entire wheelbase of a passenger car to rest on top. The long, flat design allows cars to pass without slowing as significantly as with speed humps or cushions. Because they slow cars less than similar devices, speed tables are often used on roads with typical residential speed limits.
  Speed tables can also be signed as pedestrian crossings, namely zebra crossings. A raised zebra crossing is referred to as a  wombat  crossing in Australia. Other road features may be included, such as junctions, or even mini-roundabouts. Speed tables are used with zebra crossings repeatedly in Leighton Buzzard.
caption: A less intrusive table in Auckland, New Zealand, which sacrifices some height and visual effect for integration into a high-quality road finish area. Note that part of the traffic calming effect is reached here via rough cobble stones.
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