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Manually retractable bollards (lowered by a key mechanism) are found useful in some cases because they require less infrastructure. [ 18 ] The term "robotic bollards" has been applied to traffic barricades capable of moving themselves into position on a roadway.
Jersey barriers on the road. A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic.It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision.
Other systems use retractable cones or bollards which are built into the road, or retractable fences which can divert traffic from a reversible ramp. The two center lanes of the six-lane Golden Gate Bridge are reversible; they are southbound during morning rush hour and northbound at evening rush hour.
City planners sometimes, as traffic volumes increase and as cities decide to remove or reduce traffic on specific streets of central areas, streets are closed off using bollards or landscaping. As such, these actions make new, originally unplanned dead ends and producing a new, functional blend of the inherited grid with newer street types.
A retractable bridge is a type of moveable bridge in which the deck can be rolled or slid backwards to open a gap while traffic crosses, usually a ship on a waterway. This type is sometimes referred to as a thrust bridge. The bridge is retracted to the right. Borden Avenue Bridge, Long Island City. Retractable bridges date back to medieval times.
AT&T Stadium is a retractable roof stadium in Arlington, Texas, United States. It serves as the home of the Dallas Cowboys of the National Football League (NFL), and was completed on May 27, 2009. It is also the home of the Cotton Bowl Classic , the Big 12 Championship Game , and the Southwest Classic .