Rolling stops
The classic. You slow to a near-stop, the car keeps creeping, and the examiner marks it. The fix is to stop hard enough to feel the car settle back, count one full second, then go. Practice full stops everywhere until the complete stop feels normal, not excessive.
Missed observation
Examiners cannot see you think, only what you do. Drivers who check their mirrors and blind spots without an obvious head turn get marked for not observing, even when they did. Make every check visible: turn your head before lane changes, turns, and pull-outs so it is unmistakable.
The parking maneuvers
Parallel parking, backing around a corner, and hill parking cause more fails than anything else, because most people barely practice them. They are completely learnable with reference points and repetition. Drill them until they are boring. Our step-by-step guides for parallel parking and backing and hill parking walk through each one.
Nerves
Nerves turn small habits into mistakes. The cure is preparation and a warm-up. When you have done the maneuvers a hundred times, the test is just another drive. WMST offers a test-day warm-up for exactly this, and because we are the examiner, you are tested on what you practiced.