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Available languages — Key:traffic calming
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Public-images-osm logo.svg traffic_calming
Traffic calming example.jpg
Describes features used to slow down traffic.
Group: Highways
Used on these elements
may be used on nodesmay be used on waysshould not be used on areasshould not be used on relations
Documented values: 2
Status: approvedPage for proposal

See Wikipedia-16px.png Traffic calming on Wikipedia

Traffic calming consists of engineering and other measures put in place on roads for slowing down or reducing motor-vehicle traffic as well as to improve safety for pedestrians and cyclists.

How to map

Add one of the following to either a segment of highway=* or to a node along the highway:

Common values

  • traffic_calming=yes
General / unspecified traffic calming device

Things that cause vehicles to "rise and fall"

  • traffic_calming=bump
Traffic calming example.jpg
Short bump - length (in direction of travel) about 30 cm or shorter. Spans the entire width of the road, but can have cuts and small gaps left and right for cyclists. (see speed bump)
  • traffic_calming=hump
Asphalt Speed Hump.jpg
Similar to a bump, but longer - total length usually 2-4 m (in direction of travel) (see speed hump)
Kurb Extension Nuffield Street.jpg
Designed as a long speed hump with a flat section in the middle. The flat section is long enough for all wheels of a passenger car to fit on that section simultaneously. Does not slow as much as a hump and is usually used on roads with residential speed limit. It is known as flat top hump or raised pedestrian crossing. (see speed table). Often it is a combination of traffic calming and crossing for pedestrians, so if it is there should be added highway=crossing in case it is mapped as a node.
Rubber speed cushions.jpg
A hump with spaces between or several multiple rectangular humps aligned across the road. This allows emergency vehicles, buses (due to their wider axle) and bicycles to pass through without slowing down. (see speed cushion)
North Luzon Expressway Rumble Strips.jpg
Multiple very low bumps (few cm at most) spaced few meters apart spanning the entire width of the road. Does not limit speeds as such, but are very noticeable to the driver as they generate noise and shake the car mildly. Not to be confused with the similar device used to alert drivers when they drift from their lane. (see rumble strips)
  • traffic_calming=dip
Traffic calming-dip.jpg
A dip is a traffic calming feature used to slow traffic and channeling water, that works for depression. Its dimensions are similar to bump.

Things that cause vehicles to deviate left and/or right

One-lane chicane 1.jpg
A deliberate sharp curve or series of curves street you have to drive round. The road may also be reduced in width to allow only one vehicle at a time. Called a driveway link in Australia. (see chicane)
Ferry Road, Eastham, Wirral - DSC03451.JPG
Narrowed road, sometimes signed as pinch points
See also priority=* to indicate which direction of traffic has priority at the choker (if any).
An island is a small area that temporarily separates two different directions of traffic. See also crossing=island and landuse=traffic_island for islands intended for pedestrians crossing the road.

See also