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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.
The center lane in the bridge is reversible; the middle barrier is moved with a barrier transfer machine. It's operated eastbound during the morning rush hour from 6-11 am. The bridge is named in honor of Theodore Roosevelt, the 26th President of the United States.
English: The Golden Gate Bridge Moveable Median Barrier (MMB), also affectionately known as the "median zipper." The Golden Gate Bridge was closed to automobile traffic while the MMB was being tested.
Some stretches of Interstate highway use a barrier transfer machine on some bridges to convert inner lanes from one direction to the other, where it would be too costly to upgrade/rebuild to a higher-capacity bridge. In any case the traffic distribution is strongly asymmetric depending on the hour of the day.
A barrier transfer machine is used to move the concrete barrier. [9] Johnston Street, Melbourne. Five lanes total, with the centre lane reversible. Queen's Road, Melbourne. Five lanes total, with the centre lane reversible. Tasman Bridge, Hobart. Five lanes total, with center lane reversible. Morning peak, three west, two east.
A zipper barrier was installed in 1992. [21] In 1994, the name of Malcolm Wilson was added to the bridge's name upon the 20th anniversary of his leaving the governor's office in December 1974. However, it was almost never used when the bridge was spoken about colloquially. [22] The bridge was refurbished in 2008. [23] It was redecked in 2010. [24]
This page was last edited on 26 September 2006, at 17:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Zipper Creek (Alaska) Zipper storage bag.219 Zipper, a rifle cartridge made by Winchester Repeating Arms; Barrier transfer machine or zipper machine, used for moving concrete lane dividers; Herbert Zipper (1904–1997), Austrian composer, conductor and arts activist Zipper Hall, a music venue on the campus of the Colburn School in Los Angeles ...
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