Why are painted road markings, such as crosswalks and lane lines, particularly hazardous for motorcyclists when wet?

1. The paint is often thicker than the pavement, creating an uneven surface.
2. The paint can reflect the headlights of oncoming cars, causing glare.
3. The paint offers significantly less traction, becoming extremely slippery. [18, 23]
4. The paint can hide potholes and other road damage underneath.