There you are, flying down I-40 toward Oklahoma City, when the sign stops you in your tracks: "No Tolerance." Just beneath the posted speed limit, these two words come as a shock. On the one hand, the "No Tolerance" signs are fair warning. In contrast, the "Absolute Speed Limit Law" means that driving even one mile over the posted limit is considered illegal and could result in a fine. On Oklahoma roads where the law is strictly enforced, "No Tolerance" signs drive this point home.