Site, Grounds, and Accessibility
This domain tests site improvements and the measurable accessibility details that appear on commercial inspections.
Site
Parking lots, drive aisles, sidewalks, curb cuts, grading and drainage, storm inlets, retaining walls, fencing, exterior lighting, and landscaping are included. Look for alligator cracking, potholes, ponding, trip hazards such as vertical displacement over 1/4 inch, eroded swales, and damaged wheel stops.
Accessibility basics
Under the 2010 ADA Standards, accessible car spaces are typically 8 feet wide with a 5-foot access aisle; van-accessible spaces are 11 feet with a 5-foot aisle, or 8 feet with an 8-foot aisle. Provide one accessible space per 25 total spaces and at least one van-accessible space per 6 accessible spaces. Accessible spaces and aisles must not slope more than 1:48 (about 2.08%) in any direction. Curb ramps have a maximum running slope of 1:12 and cross slope of 1:48. The accessible route must connect parking, entrance, and key amenities.
Worked example
A 120-space lot has four accessible spaces, all 8 feet wide with no access aisle, and the lone van space sign is missing. Reasoning: 120 divided by 25 equals 4.8, so five accessible spaces are required; at least one must be van-accessible. Restriping to add access aisles and a van space is needed, plus signage. Measure slope at the space and aisle before recommending paint only.
Traps
Calling a site grandfathered without checking local alteration rules; missing the accessible route from space to door; and treating ADA as the only standard when local codes may be stricter.