Why is it not necessary to use turn signals when entering a roundabout?

[Nathan]

Because entering the roundabout does not affect other vehicles, and the exit is uncertain when leaving the roundabout, so signals are required. Here are the relevant details: 1. Setup: Typically, roundabouts are set up at intersections with multiple roads (more than 3 roads). Except for vehicles turning right, all other vehicles heading to different intersections must enter the roundabout to navigate. The roundabout is generally designed with four lanes: the left lane is for left turns, the middle two lanes are for going straight, and the right lane is for right turns to exit the roundabout. 2. Precautions: Use turn signals correctly. There is no need to turn on the turn signal when entering the roundabout. Turning on the signal before entering the roundabout is the biggest misconception in roundabout driving, as it can easily cause misunderstandings among other drivers.