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Barrier transfer machine

 
Barrier Transfer Machine

 
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Barrier transfer machine
 
 
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Barrier transfer machines, also known as Zipper Machines, are heavy vehicles used to transfer Jersey barrier
Jersey barrier

A Jersey barrier or Jersey wall separates lanes of traffic with a goal of minimizing vehicle crossover in the case of accidents. They have also come into use as a means to keep car bombs away from perceived targets....
s 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.






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Barrier transfer machines, also known as Zipper Machines, are heavy vehicles used to transfer Jersey barrier
Jersey barrier

A Jersey barrier or Jersey wall separates lanes of traffic with a goal of minimizing vehicle crossover in the case of accidents. They have also come into use as a means to keep car bombs away from perceived targets....
s 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 City

Auckland City is the city and Territorial Authorities of New Zealand covering the Auckland isthmus and most of the islands of the Hauraki Gulf, in the North Island of New Zealand....
 (Auckland Harbour Bridge
Auckland Harbour Bridge

The Auckland Harbour Bridge is an eight-lane truss motorway bridge over the Waitemata Harbour, joining Saint Marys Bay, New Zealand in Auckland City with Northcote, New Zealand in North Shore City, New Zealand....
), Philadelphia, New York City
New York City

The City of New York is the List of United States cities by population in the United States, while the New York metropolitan area ranks among the List of urban areas by population....
, 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 lane
Reversible lane

A reversible lane is a lane in which traffic may travel in either direction, depending on certain conditions. Typically, it is meant to improve traffic flow during rush hours, by having overhead traffic lights and lighted street signs notify drivings which lanes are open or closed to driving or turning....
s 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.

See also

  • Reversible lane
    Reversible lane

    A reversible lane is a lane in which traffic may travel in either direction, depending on certain conditions. Typically, it is meant to improve traffic flow during rush hours, by having overhead traffic lights and lighted street signs notify drivings which lanes are open or closed to driving or turning....


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