You must use your horn to:
1. Avoid collisions (when necessary).
2. Alert another driver of a hazard.
3. Alert oncoming traffic on narrow mountain roads where you cannot see at least 200 feet ahead of your vehicle.
Driving Test is the online platform for US drivers that want to study and pass the DMV test on their first try. The system is designed to teach you the study material interactively. Plus, our practice questions cover all sections of the Highway Code. So, you have a comprehensive review of all the need-to-know information to sit the DMV driving test.