How many red reflective triangles should you carry?

Check Emergency Equipment
- Check for safety equipment:
+ Spare electrical fuses (unless vehicle has circuit breakers).
+ Three red reflective triangles.
+ Properly charged and rated fire extinguisher.
- Check for optional items such as:
+ Chains (where winter conditions require).
+ Tire changing equipment.
- List of emergency phone numbers.
- Accident reporting kit (packet). [Commercial Driver Handbook]