Home / Manitoba / Questions / Rules of the Road Rules of the Road Report Tire tread 1.5 mm (Canadian minimum 1.6 mm): A OK B Replace — below legal / safety minimum C Ignore D Only if winter Show Answer & Explanation Correct Answer: B. Replace — below legal / safety minimum Replace for safety, not just law. Previous Next More Rules of the Road Questions Rail crossing gate down, lights flashing: Pilot-car escorts oversize load: Two parallel tracks — first train passed; gates still down: Temp gauge red — steam from hood: Washer fluid fails in -30°C: Often Missed All Manitoba Questions Smart Practice Mock Exam Road Signs Guide