New retroreflective material could be used in nighttime color-changing road signs -- K Trade Fair

New retroreflective material could be used in nighttime color-changing road signs

An image series shows how a new retroreflective material can be used to make a color-changing speed limit sign. Boxes A-F show how the sign changes color, from the perspective of drivers on the road, as they pass by. Credit: Fan et al., Sci. Adv. 2019; 5 : eaaw8755.

Testing color-changing road signs at night

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