Which of the following is NOT a requirement for a sidewalk to be considered accessible?

A sidewalk is considered accessible when it meets specific criteria that ensure individuals with mobility impairments can use it effectively. The first three options listed are indeed requirements that facilitate accessibility for wheelchair users:

• The absence of obstacles is crucial, as any barriers could impede movement and pose safety hazards.

• Curb cuts are vital for enabling wheelchair users to transition between sidewalks and streets effortlessly, ensuring a smoother travel experience.

• Adequate width is essential so users can navigate without difficulty, particularly when encountering other pedestrians.

The fourth option regarding the grading of sidewalks to prevent pooling of water, while important for overall safety and usability, is not strictly defined as a requirement for accessibility according to the established standards like the Americans with Disabilities Act (ADA). While standing water can create a hazardous condition for all pedestrians, including those using wheelchairs, it is not specifically classified under accessibility requirements. Therefore, grading for this purpose is not a requirement that directly addresses the accessibility of the sidewalk itself.