One of the driver violations that poses the greatest risk to pedestrians is...

Correct answer: parking in crosswalks.

Stopping or parking on a crosswalk is prohibited and endangers people crossing. The car blocks the crossing, forces pedestrians to go around it on the roadway, and blocks the view for both pedestrians and drivers. In the image, the blue passenger car is blocking the crosswalk, and the woman with the cart cannot use it. Pedestrians do not use freeways, and seat belts protect vehicle occupants.

Real Decreto 1428/2003, de 21 de noviembre, por el que se aprueba el Reglamento General de Circulación · Malas costumbres al volante