A grid of white and red markings prohibits...

Correct answer: stopping, parking, or using the area for any purpose other than its intended one.

The red-and-white checkerboard marks the start of an arrester bed, an area intended for a vehicle whose brakes have failed. It must be kept clear, so you must not stop, park, or use it for anything else. The prohibition is not limited to stopping or parking.

Reglamento General de Circulación · Real Decreto 465/2025: catálogo oficial de señales