Button copy on a letter "X" and an extreme close up of an arrow, from a exit sign in Ohio. The silver colored circles are retroreflective; the white shapes and letters are not.
Button copy is a type of physical design for road signs in the United States. Round plastic retroreflective buttons made of transparent plastic are placed in rows following the contours of sign legend elements, usually painted white, such as letters, numbers, arrows, and borders. In daylight, the buttons visually blend with the white sign legend elements and so are minimally conspicuous. At night, light from each approaching vehicle's headlamps strikes the retroreflective buttons and is reflected back towards the eyes of the vehicle's driver. Thus the sign is made sufficiently conspicuous and legible for adequately fast and accurate recognition and interpretation by drivers.
Button copy has been supplanted by a newer technology: retroreflective sheeting made by various manufacturers in numerous colors and grades.[1] As state departments of transportation increasingly stopped specifying button copy signs in favor of signs made with sheeting, it became uneconomical to maintain production of the materials and supplies for making button copy signs. The last state to specify button copy signs was Arizona, which switched to sheeting in 2000.[2]
The advantage of button copy is durability, in that a well-made button copy sign has a service life of around 40 years.[3] In contrast, signs made out of retroreflective sheeting are expected to last only around 15 years.[3] However, at night, retroreflective sheeting is clearly visible and readable at much longer distances than button copy.[dubious – discuss]
Button copy overhead sign on I-270 in Ohio, including button copy shield outline and numerals
Button copy on overhead guide signs in Washington, showing the reflection of button reflectors in camera flash
A highway distance sign in Oklahoma using button copy
^Retroreflective Sheetings Used for Sign Faces
^Farewell to Button Copy
^ abSnibbe, Kurt (June 23, 2017). "Here's how you might see California road signs in a whole new way". The Mercury News.
Buttoncopy is a type of physical design for road signs in the United States. Round plastic retroreflective buttons made of transparent plastic are placed...
17, 2021. Buttoncopy, older style of sign manufacture no longer commonly used Retroreflective sheeting, common material for direct-applied copy v t e...
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signs gave way to signs with embossed letters, which in turn gave way to buttoncopy signs— round retroreflective "buttons" helped to achieve greater night...
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through the central business district of a city. Butterfly junction Buttoncopy A past physical design of road signs in the United States in which retroreflective...
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retroreflection, effective view angles, and lifespan. Sheeting has replaced buttoncopy as the predominant type of retroreflector used in roadway signs. There...
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Button copy overhead sign on I-270 in Ohio, including button copy shield outline and numerals
Button copy on overhead guide signs in Washington, showing the reflection of button reflectors in camera flash
A highway distance sign in Oklahoma using button copy
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