Traffic signs are among the most frequent forms of visual information display. On top of that, they provide extremely valuable information: an incorrect sign could mean serious injury or death. They have to work perfectly in all weather and lighting conditions, and they need to be consistent, so we all know what to expect.
There are some great conventions that make traffic signs and signals work well, and changing these could be confusing — but with the advent of new technologies, people are considering new features. Here are some of those new projects, and a bit about what they get wrong and what they get right.
The traffic light is an old technology, first introduced in London in 1868. It was manually controlled and lit with a gas-powered flame.
The standard three-light signal that is most common today is a good system. Each light is separate, so color blindness is not an issue.... keep reading