Diamonds (like the Tetris-shaped signs) are for warnings. Finally, we get to the symbols. Not all road signs have lettering on them, which is true in the case of Tetris-shaped road signs.

If you’ve been living in the U.S. for at least 15 years, you’ve witnessed the slow fade of all-caps road signs whether or not you realized it. What once was “BROADWAY,” for example ...

Many new vehicles show the speed limit on the GPS screen ... That includes obeying all road signs, Liu said. GPS systems and information displays are considered “convenience features” and ...

"But the problem is after you have driven past that same sign 50 times a week, you take absolutely no notice of it." Road planners are ... "We don't explain all the reasons behind why people ...