You know this law applies to non-arterial roads, most of which, I assume have a 25mph limit anyhow. Most here seem to assume that this would apply to all streets. If you were to restrict something like 4th ave downtown to 20 that would be rediculous. Or Olive , or third or 1st ... Put it this way, if a bus uses it , it should not be reduced to 20mph.

If they do this, they should enforce the speed limit strictly on those riding bikes.