What is the function of a retarder applied in buses?

Explanation

Correct answer: It offers the possibility of an alternative method of braking.

The picture shows the control lever for the retarder. This is an additional braking system, independent of the service brake, whose main function is the prolonged braking of the vehicle, for example, on long descents. Using the retarder reduces the load on the main brakes and protects them from overheating, thus providing an alternative way of reducing speed.

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