When should you use your horn?

• A. When something is in danger of hitting you
• B. To greet a friend on the road
• C. When you are frustrated with traffic
• D. When you want to signal other vehicles at a stoplight

Answer: (A)

Using your horn to alert others when something is in danger of hitting you is the appropriate and safest use of this device. The primary purpose of a vehicle's horn is to ensure safety by warning other drivers, pedestrians, or cyclists of potential hazards. This could include instances such as avoiding a collision or alerting someone who may be inadvertently moving into your path.

The other choices do not align with the intended use of a horn. Greeting a friend can be done in better ways that do not distract fellow drivers, expressing frustration with traffic is not a constructive use of the horn and can create unnecessary noise, and signaling other vehicles at a stoplight may lead to confusion or incidents, as it is not a standard traffic signal.