Why does the car deviate during Subject Three driving test?
3 Answers
Steering deviation is caused by unequal tire pressure, inconsistent tire tread patterns, or suspension system malfunctions. Below are detailed explanations of the specific causes: Unequal tire pressure: The wear degree of drive wheels is always greater than other wheels, and different friction forces can directly lead to deviation. Inconsistent tire tread patterns: It's best to use the same type of tires for the entire vehicle. At minimum, the two tires on the front axle and rear axle must be identical, with matching tread depth that doesn't exceed wear limits. Suspension system malfunction: Movement interference between suspension guide rods and steering system tie rods will affect vehicle deviation.
When I was just learning to drive and taking the third subject test, I often encountered this issue—the car kept veering to one side. The main reason was my gaze—I was looking too close, always staring at the hood or the ground instead of focusing on a target point hundreds of meters ahead. I also gripped the steering wheel too tightly out of nervousness, turning it randomly when tense, which caused the car to drift. The instructor reminded me to relax my hands, not grip too hard, and look further ahead to improve. During the test, veering is a big deal—it can lead to point deductions and even failing. It’s recommended to practice straight-line driving more, repeating the exercise on an open road. Maintaining a steady speed is crucial—avoid sudden acceleration or deceleration. Additionally, during practice, imagine driving along a straight line; a calm mindset leads to precise control. Also, pay attention to sitting upright and looking far ahead—it naturally helps control the car. With more practice and these techniques, the test becomes much easier, and safe driving relies on these basics.
Having trained students for so many years, I've noticed that veering off course during Subject 3 is quite common. Most of the time, it's due to improper steering wheel operation—beginners either turn too abruptly or hold the wheel incorrectly while focusing only on the immediate road ahead. I advise students to focus on correcting these habits during practice: grip the steering wheel lightly without excessive force; look far ahead at road markers instead of staring down. Maintain steady speed control, driving at a constant pace without sudden acceleration or deceleration; practice straight-line driving by picking a point 100 meters ahead and driving toward it. This issue can lead to point deductions during the test and affects safe driving habits, so early practice yields long-term benefits. Additionally, driving posture is crucial—sitting upright ensures better visibility. More real-road practice proves more effective than simulators, as it helps develop natural habits. Building a solid foundation not only helps pass the test but also ensures safer driving afterward.
