California DMV Motorcycle Knowledge Test (M1)Lane Position and VisibilityEasy
You are riding on a multi-lane highway and notice a vehicle in the lane to your left beginning to drift into your lane without signaling. What is your most effective immediate action?
- ASound your horn, check your mirrors, and be prepared to take evasive action.
- BFlash your high beams to alert the driver of their error.
- CSlightly reduce your speed and move to the far right of your lane.
- DAccelerate quickly to get ahead of the drifting vehicle.
Show answer & explanationAnswer & explanation
Correct answer: A. Sound your horn, check your mirrors, and be prepared to take evasive action.
When a vehicle drifts into your lane, the most immediate and effective action is to alert the driver with your horn and prepare for evasive maneuvers. This maximizes your chances of being seen and avoiding a collision.
Why the other options are wrong
- B. Flashing high beams may not be immediately noticed or understood by the drifting driver, especially in daylight, and is less effective than a horn for immediate warning.
- C. Reducing speed and moving right might not be enough to avoid a collision if the driver continues to drift, and could place you closer to the vehicle's blind spot.
- D. Accelerating might put you in a worse position if the drift continues rapidly, potentially trapping you.
Unsignaled Lane Drift Response
When another vehicle drifts into your lane without signaling, the primary response is to alert the driver and prepare for evasive action.
- Horn is an effective immediate warning.
- Be ready to brake or swerve.
- Maintain situational awareness.
Memory trick: Horn, Eyes, Hands: Ready for any lane surprise!