What are the key points for Subject 4?

[HaydenMarie]

The following are the key points for Subject 4: 1. Obstacles: When you need to change lanes to bypass an obstacle ahead, but an oncoming vehicle is already close to the obstacle, you should reduce speed or stop to give the oncoming vehicle the right of way. 2. Changing lanes: When changing lanes while driving, you should turn on the turn signal at least 3 seconds in advance to alert vehicles behind you. 3. Changing lanes at an intersection: When changing lanes before an intersection, you should follow the guide arrows in the dashed line area to enter the desired lane. 4. Changing lanes to the left: When changing lanes to the left, you should turn on the left turn signal in advance and enter the left lane without affecting the normal driving of other vehicles.