What is the drawing method for the C1 curve driving dimensions?
4 Answers
Road width: 4m for large vehicles, 3.5m for small vehicles, and 2.5m for motorcycles. Turning radius: 12m for large vehicles, 7.5m for small vehicles, and 5m for motorcycles. Turning arc length: three-eighths of the circumference.
I think the curve driving dimension drawing method is actually the technique for the S-curve in the C1 driving test. Simply put, it's about finding the right reference points to drive on the road. During the test, the dimensions of the course are fixed, with a width usually around 3 meters. You need to keep the car centered and avoid hitting the curb. The vehicle size matters—for smaller cars like the Fit, the reference points are more inward, while for larger SUVs, they're more outward. Once you enter, when the left 1/3 of the car hood covers the line edge, immediately turn the steering wheel to the right. After passing the halfway point of the curve, switch to the right perspective and turn left to straighten when the reference point covers the line. Keep the speed under 10 km/h—too slow may cause jerking, and too fast makes it hard to adjust accurately. With more practice, you can rely on feel rather than just reference points. If the wipers are dirty and you can't see clearly, it's a problem. The key is to start with the turn signal, maintain smoothness throughout, adapt to the vehicle size differences, and you'll pass the test more easily.
Just passed the C1 Subject 2 test, and I personally realized that the curve driving dimension marking is all about point-line coordination. Before entering the curve, calculate the distance properly—don’t let the car get too close to the edge. The road is about 2.5 car widths wide, and for small cars like the Polo (1.7m wide), the reference point is at the edge of the hood. First, turn left and steer when the left point covers the line, then switch to the right point to straighten the wheel halfway through the turn. Don’t memorize it too rigidly—reference points vary with vehicle size; for a pickup truck, they need to be adjusted outward. Maintain a speed of 8-10 km/h for stability—too slow and the car shakes, too fast and you’ll cross the line. On the test track, the dimensions are marked, so doing a practice lap beforehand makes it much easier. Here’s a little tip: align the rearview mirror with the curve corner to assist in adjusting your direction.
As a seasoned driver, the dimensions of curve driving relate to turning radius and trajectory calculation. When the vehicle is 1.8 meters wide, adjust the steering wheel angle after entering an S-curve to avoid minor collisions due to tight turns. In terms of technique, the reference point method is commonly used: turn right when the left quarter point of the hood aligns with the line, and straighten the wheel after the vehicle passes the midpoint and the right point aligns with the line. The course dimensions are designed to match standard vehicle widths, with reference points closer to the center for smaller cars and shifted toward the edges for larger vehicles. A low speed of 5-10 km/h is optimal for minimal dimensional errors; crossing the line usually results from misjudging dimensions or slow reactions. Practice extensively to refine your feel—don’t rely solely on reference points—and maintain at least half a meter of buffer space between the wheels and the edge.
