But not much longer. Last month, the U.S. Federal Highway Administration released its updated 1,100-page manual, which includes rules regulating signs and other traffic control devices.

The National Academy of Sciences, however, measure the response of 120 people to look at a variety of road signs. The Academy concluded that straightforward road signs were the most effective.

Neat tech, though it begs to ask the question: are signs more noticeable if they're reflected on the road in front of you? Lewin Day May 31, 2023 11:00 AM EDT 0 ...