How to Tell if the Front Wheels Are Crossing the Line in an S-Curve?

[Dean]

When entering a curve, try to stay close to the right-side line because the first turn is to the left. Turn the steering wheel one full turn to the left and check the left rearview mirror. Clearly observe the distance between the rear of the car and the left-side line from the mirror. Adjust the steering to maintain a distance of about 30 centimeters. When reaching the junction of the curves, straighten the steering wheel and proceed straight. At this point, look at the front right corner of the car and ensure the body maintains a distance of about 30 centimeters from the right-side line as seen in the mirror.

[StLiam]

To judge whether the front wheels are crossing the line on an S-curve, I usually focus on the left and right corners of the hood. When the car just enters the curve, I start observing the distance between the right edge of the hood and the roadside line, keeping a one-finger width distance as the safest. This distance means the right front wheel is about 30 cm away from the line, basically avoiding crossing it. If the right edge line becomes invisible, it means the distance is too close and the wheel is about to cross the line; if the distance exceeds three fingers' width, it's too far and easy to miss the apex of the curve. Remember to slow down when taking each curve, so there's enough time to adjust the direction. The same principle applies to left turns—just switch to observing the left edge of the hood. Practice more often, and gradually you'll develop a feel for it, allowing your eyes to naturally judge the wheel position.

[VanEverly]

After driving on mountain roads frequently in recent years, I've gained some insights on judging wheel positions in S-curves. The key isn't focusing on the tires, but observing the vehicle's heading trend. Particularly during right turns, I align the lower right corner of the windshield with the outer edge line - this reliably maintains about 30cm clearance for the right wheel. For left turns, I switch to aligning the windshield's lower left corner with the inner side of the line. If the line disappears under the hood, it indicates imminent contact and requires immediate steering correction. Conversely, excessive distance between the line and vehicle edge signals being too far outward, necessitating adjustment. The greatest risk in S-curves is nervous oversteering - maintaining slow speed ensures safest navigation.

[BellaDella]

During driving school, the instructor taught a simple method: using the rearview mirror and the hood. When turning, slightly lean your head out the window to observe the relative position between the right rearview mirror's edge and the roadside line. If the edge is parallel to the line, it means the right wheel is still far from the line; if the edge is about to touch the line, it's dangerous. At the same time, glance at the left edge of the hood—during a left turn, maintain a fist's distance from the lane line. This double-check method basically ensures you won't cross the line. Remember to roll down the window during practice for a clearer view.