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Topic 4 · Section 1

Principles of Defensive Driving

Defensive driving can be summed up as: “Drive as if everyone else might make an error.”
You can’t control other drivers’ actions, but you can control your reactions and preparedness.
Key principles include:

👀 Stay Alert and Focused

  • Pay full attention to the road.
  • Avoid distractions (phone, loud music, intense conversations).
  • Continuously scan ahead, to the sides, and check mirrors regularly.
  • Good defensive drivers are always processing and anticipating.

🛣️ Have an Escape Plan

  • Always think: “If that car suddenly brakes or swerves, where could I go?”
  • Maintain space around your vehicle (front, sides, back).
  • Identify a plan B: shoulder, adjacent lane, or enough following distance to stop.

👁️ Assume Others Don’t See You

  • Don’t assume others will yield or see you.
  • Be extra cautious at intersections, even if you have the right-of-way.

📣 Communicate Intentions

  • Use turn signals for every turn or lane change.
  • Tap your brake early when slowing to alert others.
  • Use the horn (briefly) if needed as a warning.

🌧️ Adapt to Conditions

  • Adjust for night driving, bad weather, or heavy traffic.
  • Be flexible—what’s safe in one situation may not be safe in another.

🧘 No Pride or Anger

  • Don’t engage in road games or retaliate.
  • Let others pass safely. Being “right” isn’t worth a crash.
  • Yield if needed to avoid incidents—even when you have the legal right-of-way.

🚨 Spot Problems Early

  • The sooner you see a potential hazard, the more time you have to respond.
  • Example: a fast-approaching car at a stop sign or a ball rolling into the street.

By embracing these principles, you reduce the chance of surprises.
Most collisions can be avoided if drivers anticipate hazards rather than react at the last second.

Check you have it

179 practice questions cover defensive driving and safe driving practices, each explaining the reasoning behind its answer.

Practise this topic

Source: California Driver's Handbook (DL 600, rev. 6/2025). Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.

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