The technical characteristics and economic merit of indoor sound barrier was analyzed according to the design based on the fixed type and movable type barrier.

通过固定式及活动式声屏障的设计，分析了室内声屏障的技术特点和经济效益。

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The lane would be reversible, with a movable barrier like the one in use on the Tappan Zee Bridge, Mr. Ferrara said, so that it could handle inbound traffic in the morning rush and outbound traffic in the afternoon.

WSJ: Plan to Aid Staten Island Commuters

Rather than trying to eliminate the source of these tides, between 1974 and 1984 the U.K. constructed the Thames Barrier, an innovative monumental system of movable floodgates that prevents the flooding.

FORBES: Beyond Copenhagen