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The 1914 Universal Safety Standards [1] provided for a portable 'Danger' sign suitable for both hard floors and soft dirt. Portable signs can take a variety of forms, from a traffic cone with stick on letters, plastic a-frame signs, to safety signs mounted on poles with bases that enable movement. [16]
Guide signs help road users navigate to their destination. These signs are generally rectangular in shape and have white text on green backgrounds. When a guide sign provides temporary guidance due to a work zone, it will have a black legend and border on an orange background. Examples of guide signs are street name signs, destination and ...
Traffic cones, also called pylons, witches' hats, [1] [2] road cones, highway cones, safety cones, caution cones, channelizing devices, [3] construction cones, roadworks cones, or just cones, are usually cone-shaped markers that are placed on roads or footpaths to temporarily redirect traffic in a safe manner.
Increasingly, signs have been used to remind drivers to buckle seat belts ("Click it or ticket"), obey the speed limit, and stay off the road if impaired ("Drive sober or get pulled over"). [7] In a federal study, a slight majority of drivers reported that public safety messages on dynamic message signs impacted their driving behaviors. [8]
These non-permanent temporary signs are erected to warn drivers of unexpected conditions such as road work zones, diversions, detours, lane closures and traffic control. Often these signs are portable and can also be digital variable message signs. [1] In the United States, these signs are typically orange in color.
Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs. Some have special shapes, such as the octagon for the Stop sign, the triangle for the Yield sign, and the crossbuck for railroad crossings.
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