Why does the left rear wheel cross the line in an S-curve?
3 Answers
Reason: The driver did not straighten the steering wheel, causing the car to keep turning; the body was too biased to the right during the turn. Below is relevant information about the S-curve test: 1. Regulations: Original rule: If any wheel crosses the edge line, deduct 20 points; crossing the line results in 100 points deducted. New rule: If a wheel crosses the road edge line, it results in failure; stopping midway results in failure; driving without shifting to second gear or above deducts 5 points. 2. Overview: The S-curve consists of continuous bends, also known as curve driving. The key is to maintain a steady speed and accurately control the direction. The test requires the vehicle to drive within the specified width of the S-shaped road without pressing the edge lines, with smooth and flexible steering.
Last time I encountered a situation where the left rear wheel crossed the line in an S-curve, I started thinking about the reasons. This is mostly caused by turning the steering wheel too early or too late. In an S-curve, the curve changes quickly, and if the steering wheel isn't operated flexibly, the left rear wheel can easily slide out and cross the line. Driving too fast is also a problem—when you're in a hurry, the car's centrifugal force increases, and the rear wheels can't keep up with the steering, causing them to skew. Low tire pressure is another factor; without sufficient grip, the wheels are prone to losing control. I recommend practicing small-angle turns more, slowing down in advance before entering the curve, and checking if the tire pressure is normal. Don't overlook suspension issues either, such as worn shock absorbers causing unstable body height, which affects wheel positioning. Safety first—maintain a steady speed when driving through curves, avoid speeding, and you can effectively prevent accidents. If all else fails, find an open area to practice your feel for the car—don't just experiment blindly on the road.
When navigating S-curves, I often find the left rear wheel crossing the line due to poor control of the turning radius. I had the same issue as a beginner, mainly because I was afraid of driving too close to the inside and turning the steering wheel too sharply, causing the rear wheels to lag and cross the line. At higher speeds, the car's inertia increases, making it more prone to tail swings and wheel crossing. Severe tire wear also affects performance—when the tread is shallow, the grip weakens, and the car tends to drift during turns. I've also noticed that on wet or debris-covered roads, the wheels are more likely to slip. Developing the habit of entering curves at a slower speed and steering gently rather than abruptly can help. Regularly checking tire condition and replacing them periodically can significantly reduce such issues. Practicing with a coach can improve your skills—don’t rush for speed; driving steadily is much safer. This problem may seem minor, but crossing the line could lead to fines or tire scratches, which isn’t worth the risk.
