Drivers also should not drive faster than is “reasonable and prudent” under the conditions, Trapp said, again citing state law. Conditions that could trigger the need for slower driving include bad weather, a damaged road surface or reduced visibility for any reason.

“The maximum might be 55, but if the conditions are not reasonable, you should not be driving 55,” Trapp said. “Certainly there are county roads where it’s not safe to go 55  although it’s posted  where there’s sharp turns or blind hills, that sort of thing.”