Smart work zone
A smart work zone or intelligent work zone refers to a site-specific configuration of traffic control technology deployed within a roadway work zone to increase the safety of construction workers, provide "real-time" travel information, and efficiently route motorists through a work zone. Smart work zones reduce the dependency on human "flaggers" and make the work zone safer for roadway workers.
Smart work zones often use radar guns or other non-intrusive sensors to detect the presence and speed of vehicles approaching a work zone, in order to display an appropriate message on one or more variable message signs.
In a "dynamic merge" system, for example, vehicles approaching a lane closure are directed to use all available lanes when congestion develops and speeds are low. When speeds are high, motorists are directed to merge early or are left to use their own judgement. Such a system is usually deployed in addition to traditional static messaging.
"Blind-area" diagrams can be generated using physical measurements and computer simulations to reveal the space around construction vehicles where workers and vehicles are at the highest risk of not being seen. A well-developed blind-area diagram can better inform construction crews on how to best block roads and position workers. Diagrams are created using a method jointly developed by Caterpillar Inc. and the National Institute for Occupational Safety and Health which plots equipment on a grid and determines visibility of other objects relative to the equipment.[1]
References
- ^ National Institute for Occupational Safety and Health - Division of Safety Research (15 October 2008). "Highway work zone safety - Construction Equipment Visibility". Centres for Disease Control.
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