Home / Saskatchewan / Questions / Rules of the Road Rules of the Road Report Worst SDR rating: A +22 B -20 C 0 D -5 Show Answer & Explanation Correct Answer: B. -20 Convictions / at-fault drop scale. Previous Next More Rules of the Road Questions Best Safe Driver Recognition rating: Ignition interlock after impaired conviction: Refusing breath sample: Class 4 covers: Class 1 required for: Often Missed All Saskatchewan Questions Smart Practice Mock Exam Road Signs Guide