The ADA Ramps and Curb Ramps guide explains requirements in the ADA Standards for ramps and curb ramps. The guide covers standards for:

Where Ramps and Curb Ramps are Required
Slope [§405.2] and Cross Slope [§405.3] Clear Width [§405.5] Rise [§405.6] Landings [§405.7] Doorways at Landings [§405.7.5] Handrails [§405.8, §505] Circular Cross Section and Clearance (§505.5, §505.7)
Non-Circular Cross Section and Clearance (§505.5, §505.7)
Aisle Ramps in Assembly Areas
Edge Protection [§405.9] Curb Ramps [§406] Transition to Street [§406.2] Top Landing [§406.4] Top Landing Slope
Sides of Curb Ramps [§406.3] Built-Up Curb Ramp with Side Flares
Parallel Curb Ramps
Curb Ramps at Intersections
Diagonal Curb Ramps [§406.6] Raised Crossings
Islands [§406.7] Detectable Warnings [§406.8 (DOT’s Standards), §705]