Why should you be ready to brake in this situation?

You should be ready to brake because of the tractor. Tractors often move slower than regular traffic and may enter or cross the road unpredictably. Being prepared to slow down or stop ensures safety for you, the tractor driver, and others on the road. While the motorbike ahead is also important to watch, the immediate need to be ready to brake is prompted by the slower and less maneuverable tractor. The speed limit itself does not require braking unless you are exceeding it or road conditions change. This rule helps you anticipate and react calmly to slower or obstructive vehicles typical on rural roads.