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Greg Smith stands next to the multiple school speed limit sign on Boogie Lake Road, south of Highland Road in White Lake, Mich. on Feb. 14, 2012. - 

In suburban Detroit, there's a speed limit sign telling drivers to slow down to 25 mph on school days.

If you're morning commute takes you past a school, you've probably seen this kind of thing.

But there's a big difference.

The Michigan sign includes six sets of times the rule applies:

6:49 to 7:15

7:52 to 8:22

8:37 to 9:07

And on... and on...

The AP says that a frustrated driver complained, making the point that to actually read the sign, you'd need to come to a stop.

Follow Adriene Hill at @adrienehill