"Speeding is not Safe"

Reader Callum sent me this photo of his friend's t-shirt.

At first glance, I thought the shirt had 高速按 on it, which means "high speed press", something that is used in a dry cleaning shop.

Then I realized that the phrase is actually 高速ネ安, but I had no idea what that meant. I then forward the photo to my associates to see if they would recognize what the shirt meant.

So far the consensus is that the third character ネ is actually a miswritten 不. Therefore the phrase is 高速不安, which means "speeding is not safe" or "high speed anxiety".

高 = high, tall; lofty, elevated
速 = quick, prompt, speedy
不 = no, not; un-; negative prefix
安 = peaceful, tranquil, quiet