What type of surface should be approached with extra caution when wet?

When wet, the center of a lane can be particularly hazardous due to the accumulation of oil, grease, and other debris that tends to wash towards the middle as rainwater runs off. This area often becomes slicker than the rest of the road surface, particularly after a dry spell when contaminants have built up. Motorcyclists should be especially cautious when riding over the center of a lane, as the reduced traction can lead to loss of control.

While other surfaces, such as concrete pavement, tar strips, and gravel roads, also require caution in wet conditions, the center of the lane is uniquely risky due to the specific concentration of slick substances. Therefore, it's important for riders to be aware of this increased danger and adjust their riding technique accordingly, such as avoiding sudden maneuvers or rapid acceleration when riding over this area after rain.