Barrier transfer machine
Heavy vehicle used to transfer concrete lane dividers during rush hours / From Wikipedia, the free encyclopedia
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A barrier transfer machine, also known as zipper machine or road zipper, is a type of heavy vehicle that is used to transfer concrete lane dividers, such as Jersey barriers, in order to relieve traffic congestion during rush hours. Many other cities use them temporarily during construction work.[2][3][4][5] The lanes created by the machine are sometimes referred to as "zipper lanes".
One advantage of barrier systems over other lane management treatments such as traffic cones or overhead directional lights is that a solid, positive barrier prevents vehicle collisions due to motorists crossing over into opposing traffic flow.[6][7] A disadvantage is that lane widths can be slightly reduced.[7]