On the freeway, you've probably seen messages from the Arizona Department of Transportation such as "Hello from the other side, buckle up and stay alive."
Now, the public has a chance to send their own messages to drivers.
From now until February 19 you can submit your sign ideas to ADOT.
In March the finalists will be posted online to vote on.
ADOT's signs accommodate three lines with eighteen characters per line.
Hashtags and emojis are not allowed.
To submit your sign idea, head to ADOT's website.