How wide is 30cm in the rearview mirror?

[Camargo]

In the rearview mirror, 30cm is approximately the width of two fingers. Here are specific techniques for finding 30cm: 1. Observe the position of the hood: After hearing the voice prompt, you need to drive forward and stay to the right. When you see the right front corner of the hood (about 1/3 of its length) align with the roadside line, the distance between the car body and the roadside line is exactly 30cm. 2. Look at the raised part of the wiper: From the driver's seat, when the raised part of the wiper aligns with the right roadside line, the distance is about 30cm. 3. Look at the right front door handle: Observe the right front door handle in the right rearview mirror. If the right front door handle is tangent to the right roadside line, the distance is 30cm; if it's too far, you need to adjust the direction slightly; if it's too close, there's a risk of crossing the line.