Mirror, Signal, Blind Spot – Why It Matters on the WA Driving Test

The Key to Passing the Washington State Skills Test

Among the many skills evaluated during the Washington State DOL Skills Test, the consistent and correct execution of the Mirror, Signal, Blind Spot sequence stands out as absolutely critical.

It is more than just a procedural step; it is the bedrock of safe lateral movement in traffic. Whether you are changing lanes, merging onto a highway, pulling away from a curb, or moving within your lane to navigate around an obstacle, this observation routine is non-negotiable.

Examiner Expectations in WA:

Examiners place a heavy emphasis on this sequence because it directly reflects a driver’s awareness. Failing to perform it correctly—or forgetting steps—indicates a dangerous lack of observation. This isn’t just about ticking boxes on a driving test checklist; it is about demonstrating a fundamental habit that protects everyone on the road.

Why Proper Observation Is Key to Passing

From the moment your Skills Test begins, the examiner is assessing your observation skills. Their role is to ensure only drivers who are consistently aware of their surroundings are granted a license.

The “Why” Behind the Sequence:

Driving requires managing the space around your vehicle (front, back, and sides). While mirrors provide crucial information, they have inherent limitations—specifically, blind spots. A car, motorcycle, or cyclist could easily be hidden in these zones.

Le Mirror, Signal, Mirror, Blind Spot sequence is the only systematic way to gather necessary information before moving sideways.

The Anatomy of Safe Observation

1. Rearview Mirror: Tells you the speed and position of traffic approaching from behind. You must monitor this before changing speed or direction. Tip: If someone is following too closely, signal earlier than usual.
2. Signal: Communicates your intention to move laterally. This gives other road users advanced warning.
3. Side-Mirror: Tells you how much space you have in the adjacent lane so you can adjust your speed to enter safely.
4. Blind Spot Check (Head Check): Physically verifies that the space you intend to move into is actually clear right before you commit.

Critical Warning: Examiners understand that skipping the blind spot check is dangerous. It can lead directly to colliding with a vehicle you simply didn’t see.

The Correct Procedure: Step-by-Step

Mastering the sequence requires precision. Here is the correct breakdown for safe lane changes and lateral movements:

Step 1: Check Your Rearview Mirror

Before initiating any move, check the rearview mirror to understand the traffic situation behind you. Adjust your speed to match the gap you intend to enter.

Step 2: Activate Your Turn Signal

Once you identify an opportunity, activate your signal.

• WA Law (RCW 46.61.305): You must signal continuously for at least 100 feet before making your move.
• Rule: Don’t signal as you move; signal before you move.

Step 3: Check the Side Mirror

Check the mirror corresponding to your direction of movement (e.g., left mirror for a left lane change). Assess the speed and distance of approaching vehicles.

Step 4: The Blind Spot Check (Head/Shoulder Check)

This is the most critical and often-missed step.

Physically turn your head quickly but deliberately to look over your shoulder into the area not covered by mirrors.

• Left Change: Look over your left shoulder.
• Right Change: Look over your right shoulder.
• Note: This should be a quick glance, not a prolonged stare. You are looking for vehicles, motorcycles, or cyclists lurking in the blind spot.

Step 5: Execute the Maneuver

If—and only if—your mirrors and blind spot check confirm the way is clear, smoothly steer into the new position. Maintain or increase speed to match traffic flow.

Step 6: Cancel Your Signal

Ensure the signal is off once you are established in your new position. Adjust your following distance accordingly.

Top Mistakes Students Make

Examiners frequently deduct points or fail candidates for these common errors:

• Not Monitoring Traffic Behind: Failing to check the rearview mirror regularly leaves you unaware of fast-approaching vehicles.
• Forgetting the Blind Spot Check: This is the most dangerous error. Relying only on mirrors is a gamble. Examiners watch specifically for that physical head turn.
• Signaling Too Late (or Not at All): Activating the signal as you turn the wheel violates WA law. You must signal at least 100 feet in advance.
• Signaling Too Early: Signaling before passing an intermediate street or driveway can confuse other drivers, leading them to pull out in front of you.
• Incorrect Order: Checking the blind spot before signaling disrupts the logical flow. Remember: Assess $\rightarrow$ Declare Intent $\rightarrow$ Confirm Clearance $\rightarrow$ Go.
• The “Fake” Check: A quick flick of the eyes isn’t enough. The examiner needs to see a distinct (though not theatrical) turn of the head.

Instructor Tips: The WMST Difference

Developing this sequence into an automatic habit takes practice. Reading about it isn’t enough; this is where quality, hands-on instruction becomes indispensable.

Why WMST Training is Superior:

• Real-World Application: We guarantee six full hours of behind-the-wheel instruction. unlike simulators, which cannot replicate peripheral awareness, our students practice on actual Washington roads with real traffic.
• Constant Reinforcement: Our certified instructors provide immediate feedback (e.g., “Good mirror check, but you signaled a bit late—aim for 100 feet next time”). This correction loop builds accurate muscle memory.
• No Simulator Shortcuts: We choose not to substitute valuable in-car time with simulators. The instinctive head check for blind spots cannot be adequately assessed in a virtual environment.

By integrating the observation check into every relevant driving action, WMST ensures learners master the habit of vigilant observation, not just the theory.

Frequently Asked Questions (FAQs)

Will I fail if I forget to check a blind spot?

Forgetting a single check may result in a point deduction. However, repeatedly forgetting checks, or missing one in a critical situation that forces another driver to react, is considered a dangerous action and can lead to an automatic fail.

How often should I check mirrors during the test?

You should check your rearview mirror roughly every 5-8 seconds to maintain awareness. Additionally, you must check mirrors before slowing down, stopping, turning, or changing lanes.

Do examiners look for exaggerated head movements?

No, they look for effective movements. A quick, deliberate turn of the head is expected. Overly slow or theatrical movements take your eyes off the road for too long and should be avoided.

What if I signal too early or too late?

Both are errors. Signaling too early (before an intermediate junction) causes confusion; signaling too late (less than 100 feet) gives insufficient warning. Timing is key to safe lateral moves.