When riding a motorcycle in the rain, it is crucial to pay attention to the **road markings** on the road, as these can become **very slippery**. This is because, when it rains, the first drops of water mix with dust, grease, and other dirt on the road surface, creating a slippery layer that can cause the motorcycle's wheels to skid. The painted lines on the road, such as pedestrian crossings or dividing lines, are especially prone to becoming slippery in these conditions. Therefore, it is important to be aware of these areas and ride cautiously to avoid accidents.