Something significant is about to happen!  According to the Wisconsin Department of Transportation, their agency is about to run out of available three-letter/three-number combinations.  A post and story on their Facebook page suggests that the current set-up has lasted for about 31 years before hitting the end of the line for remaining plate numbers.

But don't worry:  WISDOT is about to unveil new 7-character I.D.'s which will allow for more plates in the future.