What is the principle of turning a car past the B-pillar?

[Vanessa]

B-pillar rule is suitable for four-door cars with balanced body proportions. When the car is about to turn, if the driver's line of sight just reaches the B-pillar, it indicates that the car's length is just right to avoid collision and can safely complete the turn. For common right turns at intersections, you can start steering when the vehicle's B-pillar reaches the stop line. The principle of turning past the B-pillar is that when you feel half of the car's body has passed the stop line, you can make the turn. Precautions for turning are as follows: 1. Control speed: The first thing to pay attention to when turning is not to apply the brake during the turn, as it can easily lead to loss of control, causing skidding or even rollover. You should reduce the speed to an appropriate level before entering the turn. 2. Avoid neutral gear when turning: Try not to enter a turn in neutral gear, especially for U-turns. In neutral gear, the engine cannot restrain the wheels' movement, and the car is essentially moving by inertia, which greatly reduces the effectiveness of all braking and steering operations.