Here's some advice, culled from the California Driver Handbook, on when and when not to use a vehicle horn. You may want to pass these tips along to your fleet drivers as a friendly reminder. 

Use Your Horn

  • When necessary, to avoid acci­dents.
  • To try to get "eye contact" with other drivers. Tap your horn to alert another driver, who might otherwise turn in front of you.
  • On narrow mountain roads, where you cannot see at least 200 feet ahead.  

Don't Use Your Horn

  • If a driver is going slowly, and you want him or her to drive faster. The driver may be ill, lost, intoxicated or having problems with the vehicle.
  • If slowing or stopping your car will prevent an accident. It's safer to use the brakes than honk the horn.
  • To show other drivers that they made a mistake. Your honking may cause them to make more mistakes.
  • Because you are angry or upset.