What are the functions of turn signals?

[MacAnderson]

The functions of turn signals are as follows: 1. Driving in roundabouts. (1) When entering a roundabout, turn on the left turn signal in advance to alert the following vehicles. (2) When exiting a roundabout, turn on the right turn signal in advance and pay attention to yielding to vehicles on the right rear. (3) When driving within a roundabout, the principle of 'exit before entry' should be followed. Do not force your way in, and safe driving is the most important. 2. Using turn signals to compete for parking spaces. 3. Turn on the right turn signal when spotting a parking space. Activate the right turn signal in advance to alert following vehicles to yield, while positioning the vehicle as close as possible to the parking space to block it with the car body. This signals to vehicles behind that the parking space is occupied.