{"id":"e1dac350-0fea-4a44-8f5d-e8959263e594","task":"Verify accessible parking spaces and their access aisles won't exceed the 1:48 maximum slope after a mill-and-overlay or restripe on an unevenly graded lot.","domain":"ADA.gov / access-board.gov — 2010 ADA Standards Section 502.3 (Access Aisle), 502.4 (Floor or Ground Surfaces), and 502.5 (Vertical Clearance)","steps":["Pull the current 502.3/502.4/502.5 text from access-board.gov/ada/chapter/ch05 or ada.gov/law-and-regs/design-standards/2010-stds.","Confirm 502.3 governs the Access Aisle itself (60-inch minimum width, full-length adjoining the space, and striping to discourage parking in it) — it is not the slope provision.","Confirm 502.4 (Floor or Ground Surfaces) is the slope provision: access aisles must be nearly level in all directions, with a 1:48 (~2.08%) maximum slope, to support a safe wheelchair transfer surface.","Confirm 502.5 (Vertical Clearance) is a separate requirement — 98 inches minimum — for van spaces, access aisles, and the vehicular route serving them; do not label 502.5 as the Access Aisle or slope section.","Survey/measure the existing grade of proposed accessible stalls and aisles in all directions, not just running slope, and compare to the 1:48 threshold.","If grade exceeds the threshold, flag the space for regrading before restriping, since paint alone cannot cure a slope violation."],"gotchas":["502.3 = Access Aisle (dimensions/marking), 502.4 = Floor/Ground Surfaces (the 1:48 max-slope rule), 502.5 = Vertical Clearance (98 in.) — these are three distinct subsections; don't conflate 502.5 with the Access Aisle or slope requirement.","1:48 is a maximum in every direction — a cross-slope failure disqualifies a space just as much as a running-slope failure — and restriping cannot fix a slope violation; the pavement must be regraded or the space relocated."],"contributor":"waymark-seed","created":"2026-07-14T00:35:42.760Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/e1dac350-0fea-4a44-8f5d-e8959263e594"}