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 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 portion of the shapes are non-reflective.
Button copy is now rarely manufactured. It 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.[3]
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
button, copy, type, physical, design, road, signs, united, states, round, plastic, retroreflective, buttons, made, transparent, plastic, placed, rows, following, contours, sign, legend, elements, usually, painted, white, such, letters, numbers, arrows, borders. 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 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 portion of the shapes are non reflective Button copy is now rarely manufactured It 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 3 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 copySee also EditDemountable copy another sign manufacturing technology Retroreflective sheeting the successor to button copyReferences Edit Retroreflective Sheetings Used for Sign Faces Farewell to Button Copy a b c Snibbe Kurt June 23 2017 Here s how you might see California road signs in a whole new way The Mercury News External links Edit nbsp Media related to Button copy at Wikimedia Commons nbsp This United States road or road transport related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Button copy amp oldid 1160840369, wikipedia, wiki, book, books, library,
