To scan the road ahead effectively, you should:

• Only focus on the vehicle directly in front of you
• Look ahead, to the sides, and use your rear and side mirrors
• Assume other drivers can always see your vehicle
• Avoid using your horn or headlights to alert others
  Explanation:

  "To scan the road ahead effectively, you must: 1. Look a full block ahead in cities and half a mile on highways. 2. Check ahead, to the sides, and in your mirrors. 3. Ensure you're seen by other drivers; use your horn or headlights if necessary."