Barrier transfer machine

Barrier transfer machine

Barrier transfer machines, also known as Zipper Machines, are heavy vehicles used to transfer Jersey barriers or other concrete lane dividers used to relieve traffic congestion during rush hours.

The vehicle contains an S-shaped channel in its undercarriage which lifts the barrier segments (which may weigh over a thousand pounds) off the road surface and transfers them over to the other side of the lane, reallocating traffic lanes to accommodate increased traffic for the currently dominant (tidal) direction. These barriers are linked together with steel connectors to create a formidable but flexible safety barrier.

Moveable barriers are in permanent use in such cities as Auckland City (Auckland Harbour Bridge), Philadelphia, New York City, Honolulu, Boston, Washington, DC and Dallas, while many other cities use them temporarily during construction work.

A variant of the machine uses two narrower machines running in tandem. This setup tends to be used in reversible lanes when the movable barrier is used to divide two directions of traffic--the narrower machines are less of an impediment to traffic in either direction. The lanes created by the machine are sometimes referred to as zipper lanes.

ee also

*Reversible lane

External links

* [http://www.roadstothefuture.com/Zipper_I95_JRB.html A zipper machine in action on I-95.]


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Machine translation — Part of a series on Translation Types Language interpretation …   Wikipedia

  • Jersey barrier — 42 inch (110 cm) high version of the Jersey barrier for deflecting automobiles and semi trailer trucks. A Jersey barrier or Jersey wall is a modular concrete barrier employed to separate lanes of traffic. It is designed to both minimize… …   Wikipedia

  • Machine press — Manual goldsmith press Power press with a fixed barr …   Wikipedia

  • Reversible lane — The Lions Gate Bridge from the south end in Stanley Park, Vancouver. A reversible lane (British English: tidal flow), called a counterflow lane or contraflow lane in transport engineering nomenclature, is a lane in which traffi …   Wikipedia

  • Theodore Roosevelt Bridge — (also known as the Teddy Roosevelt Bridge) is located in Washington, D.C. It carries Interstate 66 and U.S. Highway 50 over the Potomac River, connecting Rosslyn, Virginia, with Washington near the Kennedy Center. The bridge crosses over Theodore …   Wikipedia

  • Transformation fetish — is a context of sexual fetishism in which a person becomes sexually aroused by descriptions or depictions of transformations, usually the transformations of people into other beings or objects. GroupsThe Transformation, or TF community does not… …   Wikipedia

  • Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

  • Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …   Universalium

  • World War I — the war fought mainly in Europe and the Middle East, between the Central Powers and the Allies, beginning on July 28, 1914, and ending on November 11, 1918, with the collapse of the Central Powers. Abbr.: WWI Also called Great War, War of the… …   Universalium

  • china — /chuy neuh/, n. 1. a translucent ceramic material, biscuit fired at a high temperature, its glaze fired at a low temperature. 2. any porcelain ware. 3. plates, cups, saucers, etc., collectively. 4. figurines made of porcelain or ceramic material …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”