Home / Newfoundland and Labrador / Questions / Rules of the Road Rules of the Road Report Horn used to: A Express frustration B Warn of danger or collision C Greet friends D Whenever Show Answer & Explanation Correct Answer: B. Warn of danger or collision Excessive = noise bylaw. Previous Next More Rules of the Road Questions Preparing for NL Class 5 road test: NL Class 5 road test evaluates: Auto-fail on NL road test: NL driver's abstract shows: After collision, drivers exchange: Often Missed All Newfoundland and Labrador Questions Smart Practice Mock Exam Road Signs Guide