This makes it sound as if the new ones aren’t designed for readability. They absolutely are, and typographically speaking, they’re potentially superior as they lean on the massive pre-existing body of research done for other highway signage around the country. The new ones are simply part of a blue-and-gold rebrand that a lot of folks find more boring and less fun than the previous system from the 90s.The old signs were designed for readability, and thus safety. That's the most important thing, and it worked. In a lot of people's minds these "clean, plain, and boring" signs have taken that a step backwards. I don't see that as an improvement.