In which decade did 3M introduce the first reflective sheeting for road signs?
1920s
1930s
1940s
1950s
Answer
3M introduced the first reflective sheeting for road signs in the 1940s. This innovation improved nighttime visibility and safety for drivers, and it has since become a standard feature on road signs around the world.
Mastering the Magic of 3M: The Ultimate Quiz on the American Multinational Giant