CDL General Knowledge TestDriving SafelyMedium
You are driving a commercial vehicle on a multi-lane highway and need to change lanes to the right. After checking your mirrors and signaling, what is the next crucial step before initiating the lane change?
- AIncrease your speed to quickly merge into the adjacent lane.
- BTurn your head to check your blind spots.
- CBriefly apply the brakes to create a gap.
- DHonk your horn to alert other drivers of your intention.
Show answer & explanationAnswer & explanation
Correct answer: B. Turn your head to check your blind spots.
Even with properly adjusted mirrors, commercial vehicles have significant blind spots. A head check (or 'shoulder check') is crucial to visually confirm that no vehicle is in your blind spot before starting a lane change, preventing collisions.
Why the other options are wrong
- A. Increasing speed can be dangerous if the gap isn't large enough or if other drivers don't anticipate it.
- C. Braking abruptly can create a rear-end collision hazard and is not part of a safe lane change.
- D. Honking is for warning, not for signaling a lane change; it can cause confusion.
Safe Lane Change Procedure
A systematic process for changing lanes safely in a commercial vehicle, minimizing the risk of collisions.
- Check mirrors for traffic.
- Signal your intention.
- Perform a head check for blind spots.
- If clear, execute the lane change smoothly.
- Cancel signal and recheck mirrors.
Memory trick: Mirrors, signal, head check, then you direct.