Medical professionals classify road rash into three degrees based on the depth of the tissue damage:

: Affects only the outermost layer of skin (epidermis). Symptoms include redness, tenderness, and minor scrapes similar to a bad sunburn.

: The most severe form, destroying all layers of skin and potentially exposing fat, muscle, or bone. Paradoxically, it may be less painful than lower degrees if nerve endings have been destroyed. Treatment and First Aid Road Rash Treatment & Prevention - Cleveland Clinic

Motorcycle (also known as road burn ) is a friction burn caused when a rider’s skin slides across a paved surface, such as asphalt or concrete. This injury occurs due to both the force of the slide and the heat generated by friction, which can grind away layers of skin and embed debris like gravel or glass directly into the wound. Severity Levels of Road Rash

: Penetrates into the deeper skin layers (dermis). It often involves bleeding, swelling, blistering, and embedded debris.