Under what circumstances should you drive slower than the posted speed limit?
In situations where the road surface is damp, slippery, or visibility is compromised—or if any other factors make driving conditions less than ideal—reduce your speed below the posted limit. It's important to note that even when adhering to the posted limit, you can still receive a ticket if your speed is deemed inappropriate for the prevailing conditions.
Cut Study Time from Hours to Minutes with the Oklahoma DMV “Cheat Sheet”