Color-Changing Signs (IMAGE)

University at Buffalo

Color-Changing Signs

Caption

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., <em>Sci. Adv.</em> 2019; 5 : eaaw8755. This work is licensed under CC BY-NC (http://creativecommons.org/licenses/by-nc/4.0/).

Usage Restrictions

This work is licensed under CC BY-NC (http://creativecommons.org/licenses/by-nc/4.0/).

License

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