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A barrier or barricade is a physical structure which blocks or impedes something.

Barrier may also refer to:

Physical

Defensive

• Border barrier, between two countries
• Border control, at the border between countries
• Defensive wall, built to protect against potential aggression

Roadway

• Automatic full barriers, which serve to block roads at railway crossings
• Boom barrier, which serves to block vehicular access
• Fitch Barrier, a plastic barrel filled with sand or water, used on highways as an impact attenuator
• Roadblock, a temporary installation to control or block traffic on a road
• Traffic barrier (crash barrier), used to keep vehicles within their roadway
  • Cable barrier
  • Concrete step barrier
  • Constant-slope barrier
  • F-Shape barrier
  • Guard rail
  • Jersey barrier or K-rail, a type of concrete barrier used to divide highway traffic

Crowd and noise control

• Crowd control barrier, temporary fencing used to keep crowds inside or away from a certain area
• Noise barrier, walls and other structures used to attenuate noise pollution

Race Track

• barrier, what a horse comes out of at a start of a race

Flood control by flood barriers

• Thames Barrier, a flood control structure on the River Thames in England
• Hesco bastion, a dirt-filled wire mesh/cloth container used for flood control and military fortification
• Breakwater (structure), a barrier created as part of coastal defense or to protect an anchorage from the effects of both weather and longshore drift
• Vapor barrier, any material used to resist diffusion of moisture through walls, ceilings or floors

In science

• Barrier (computer science), a type of synchronization in parallel computing
  • Memory barrier, an instruction to enforce an ordering constraint on memory operations in a computer program
• Blood–brain barrier, a separation of circulating blood and the brain extracellular fluid
• Potential barrier, a standard problem in physics of quantum mechanics
• Sound barrier, the point at which an aircraft moves from transonic to supersonic speed
• Barrier island, in geology and geography
• Barrier isolator, a physical barrier between a laboratory technician and a work process
• Barrier ridge, in geology

Places

• Barrier, Kentucky, a community in the United States
• Barrier, Voerendaal, a place in the municipality of Voerendaal, in southeastern Netherlands
• The Barrier, a lava dam in southwestern British Columbia, Canada
• The Barrier, Great Ice Barrier, Victoria Barrier etc., later 19th–early 20th century names for the Ross Ice Shelf, Antarctica
• Barrier Bay, an open bay in Antarctica
• Barrier reef, a type of coral reef running along a coast for a long distance, e.g.:
  • Belize Barrier Reef, a series of coral reefs straddling the coast of Belize
  • Great Barrier Reef, in the Coral Sea off the coast of Queensland in north-east Australia
• Barrier Volcano, an active shield volcano in Kenya
• Gilf Kebir, Arabic for "the Great Barrier" in Egypt
• Great Barrier Island, in the north of New Zealand
• A misspelling of Barriere, British Columbia, a small community in Thompson-Nicola Regional District, British Columbia, Canada

In arts and entertainment

• Barrier (video game), a 1979 arcade game by Vectorbeam
• "Barrier", a 1985 song by Simon Townshend on the album Moving Target
• Barriers, a UK television series
• The Barrier (1926 film), a 1926 silent film
• The Barrier (1937 film), a 1937 American film
• The Barrier (1979 film), a 1979 Bulgarian film
• The Barrier (1990 film), a 1990 Bahraini film
• Bariera, a 1966 Polish film, released in the U.S. as Barrier
• Barrierfreeman, a fictional character in the anime Ultimate Muscle

Other uses

• Barrier Highway, a state highway in New South Wales, Australia
• Barrier and Afterword, a An ongoing Mexico/American comic book series published by COMICS ALLIANCE and Panelsyndicate.
• Smith Barrier (died 1989), American sports journalist
• Language barrier, difficulty in communications caused by language difference
• Trade barrier, a restriction of trade by a government
• Barriers to entry, a cost that must be incurred by a new entrant into a market

See also

• Barrière (disambiguation)
• Barrier option
• Concrete barrier (disambiguation)
• Dam
• Great Barrier (disambiguation)
• List of walls

References

• Disambiguation pages