ADA Accessible Parking Striping in Oklahoma
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ADA Accessible Parking Is Federal Law — Not a Best Practice
The Americans with Disabilities Act requires any business, non-profit organization, or state and local government that provides parking to include a specific number of accessible parking spaces — designed to precise dimensional standards — on the shortest accessible route to the accessible building entrance. This is not a building code recommendation; it is a federally enforceable civil rights law.
The requirements are established in the 2010 ADA Standards for Accessible Design (specifically Sections 208 and 502) and are enforced through the U.S. Department of Justice. Non-compliant parking lots expose property owners to ADA complaints, private lawsuits, and court-ordered remediation — all of which cost far more than a compliant re-stripe. 633 Asphalt & Construction LLC brings accurate knowledge of the 2010 Standards to every parking lot project in Oklahoma.
⚖️The Restriping Obligation — No Grandfather Clause
Per the ADA.gov Compliance Brief on Restriping Parking Spaces: any time a business or government entity re-stripes a parking lot, it must provide ADA-compliant accessible parking spaces. Because re-striping is relatively inexpensive, it is considered “readily achievable” — meaning cost is not an accepted defense. There is no grandfather clause exempting pre-ADA lots from this obligation when re-striping occurs.
This means every re-stripe 633 Asphalt performs includes an ADA accessible stall audit. We will not re-stripe a lot and leave non-compliant accessible stalls in place.
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Complete ADA Accessible Parking Requirements — 2010 Standards
ADA compliance involves more than stall count and width. Here is the complete set of requirements that 633 Asphalt verifies and installs on every accessible parking project in Oklahoma.
§ 208.1 — Required Count
Minimum Number of Accessible Stalls
The required count is determined per-facility using the Table 208.2 stall count table above. Lots of 1–25 stalls need 1 accessible space. The count scales up to 20 + 1 per 100 over 1,000 for very large lots.
Calculated per lot, not per site
§ 208.2.4 — Van Spaces
Van-Accessible Ratio
1 of every 6 accessible spaces (or fraction of 6) must be van-accessible. A lot with only 1 accessible space must make that space van-accessible. A lot with 7 accessible spaces needs at least 2 van-accessible.
1-in-6 minimum; always at least 1
§ 502.2 — Stall Width
Minimum Stall Width
Car-accessible stalls: minimum 96 inches (8 feet) wide. Van-accessible stalls: minimum 132 inches (11 feet) wide, or 96 inches wide with a 96-inch access aisle. Width is measured from center of line to center of line for shared aisles.
Car: 96" · Van: 132" or 96"+96" aisle
§ 502.3 — Access Aisle
Access Aisle Width
Each accessible stall must have an adjacent access aisle. Car stall aisle: minimum 60 inches wide. Van stall aisle (standard config): minimum 96 inches wide. Access aisles may be shared between two adjacent accessible stalls.
Car aisle: 60" min · Van aisle: 96" min
§ 502.3.3 — Marking
Access Aisle Marking
Access aisles must be marked with diagonal striping to discourage vehicle parking. The words "NO PARKING" can also be painted in the aisle. The marking prevents other vehicles from blocking the accessible entry/exit path.
Diagonal hatch + NO PARKING text
§ 208.3 — Location
Shortest Accessible Route
Accessible spaces must be on the shortest accessible route to an accessible facility entrance. If a building has multiple accessible entrances with adjacent parking, accessible spaces must be dispersed near each entrance.
Nearest accessible entrance — always
§ 502.4 — Surface
Level Surface
The parking space and access aisle must be on a surface that is stable, firm, and slip-resistant with slopes not exceeding 1:48 (2%) in any direction. This is why accessible stalls cannot be placed on steeply sloped areas of the lot.
Max 2% slope in any direction
§ 502.6 — Vertical Clearance
Van Height Clearance
Van-accessible spaces, their access aisles, and the vehicular route to and from them must provide a minimum vertical clearance of 98 inches. This rules out covered/enclosed areas with low ceilings for van-accessible stalls.
98" minimum vertical clearance
Special Facility Types — Higher Accessible Stall Requirements
Certain facility types require a significantly higher percentage of accessible parking than the standard commercial lot table. If your property falls into one of these categories, the standard table does not apply.
| Facility Type | Requirement | ADA Section |
|---|---|---|
| Hospital outpatient facilities | 10% of patient/visitor spaces | 208.2.1 |
| Rehabilitation facilities (physical therapy) | 20% of patient/visitor spaces | 208.2.2 |
| Outpatient physical therapy facilities | 20% of patient/visitor spaces | 208.2.2 |
| Residential facilities (housing) | 2% of spaces; special assignment rules | 208.2.3 |
| Valet-only parking | 1 passenger loading zone required | 208.2.5 |
If your property includes any of these uses, 633 Asphalt recommends consulting with an ADA accessibility consultant or the ADA.gov parking guidance before scheduling the striping work, as the stall counts and location requirements differ substantially from the standard table.
Common ADA Parking Violations We Find in Oklahoma Lots
These are the most common non-compliance issues 633 Asphalt finds when we assess existing Oklahoma parking lots. If your lot was last striped more than 5 years ago or by a contractor unfamiliar with ADA requirements, there is a high probability of at least one of these violations.
01
Insufficient Stall Count
The most common issue — the lot has fewer accessible stalls than the 2010 Standards Table 208.2 requires for the total stall count. Often the result of a re-stripe by a contractor who added “a few blue spaces” without consulting the requirement table.
✓ We calculate the correct count from Table 208.2, lay out the required number of accessible stalls in compliant locations, and stripe to standard.
02
No Van-Accessible Space
The lot has accessible spaces but none designated and dimensioned for van access. Even a lot with only 1 accessible space must make that space van-accessible with a 96-inch or wider access aisle.
✓ We identify which accessible stall is most suitable for van-accessible configuration and re-stripe with correct aisle width and “Van Accessible” signage.
03
Access Aisle Too Narrow
The access aisle adjacent to the accessible stall is less than 60 inches wide (car) or less than 96 inches wide (van). A common mistake when the contractor simply lined the accessible stall next to a standard stall without setting the correct aisle width.
✓ We measure each aisle, remove non-compliant markings where needed, and re-stripe the stall configuration with correct aisle dimensions.
04
Access Aisle Not Marked
The access aisle exists in terms of space but has no diagonal hatching or “NO PARKING” stencil. Without marking, other drivers park in the aisle — blocking accessibility and technically putting the property in violation.
✓ We apply diagonal hatch striping to all access aisles as part of every ADA striping job.
05
Wrong Location — Not Shortest Route
Accessible stalls are placed at the far end of the lot or in a convenient corner rather than on the shortest accessible route to the accessible building entrance. This is a frequent compliance failure in older lots.
✓ We walk the accessible route from each entrance and place accessible stalls at the location that satisfies the shortest accessible route requirement.
06
Pavement-Only ISA Symbol — No Vertical Sign
The accessible stall is identified only by a painted ISA symbol on the pavement. The 2010 Standards require a vertical sign mounted at 60 inches minimum height — the pavement symbol is good practice but not a substitute for the vertical sign.
✓ We install or coordinate installation of compliant vertical ISA signs at 60 inches minimum height for every accessible stall we stripe.
Driveway Sealcoating FAQ
How many ADA accessible stalls does my parking lot require?
The count is determined by Table 208.2 of the 2010 ADA Standards: 1–25 total stalls = 1; 26–50 = 2; 51–75 = 3; 76–100 = 4; 101–150 = 5; 151–200 = 6; 201–300 = 7; 301–400 = 8; 401–500 = 9; 500–1,000 = 2%. Of those, 1 in 6 must be van-accessible. The count is per individual facility — not summed across a site. Source: ADA.gov Compliance Brief on Restriping.
What are the exact dimensions for an ADA accessible parking stall?
Car-accessible: minimum 96-inch (8-foot) wide stall plus a 60-inch (5-foot) access aisle. Van-accessible: either a 132-inch (11-foot) stall with a 60-inch aisle, or a 96-inch stall with a 96-inch access aisle. All stalls and aisles must be on a surface with a maximum 2% slope in any direction. Van stalls must have 98-inch minimum vertical clearance.
Does re-striping my lot require ADA accessible spaces?
Is a painted ISA symbol enough, or do I need a sign?
A vertical sign is required. The 2010 ADA Standards require each accessible stall to be identified by a sign displaying the ISA mounted at 60 inches minimum above grade to the bottom of the sign. A pavement-only ISA symbol is not sufficient on its own — the pavement marking is a best practice addition, not a substitute. Exception: lots with 4 or fewer total stalls do not need a sign on the van-accessible space (though the stall must still be fully dimensioned).
What is the penalty for a non-compliant ADA parking lot?
Non-compliant accessible parking can result in ADA complaints filed with the DOJ, private civil rights lawsuits under ADA Title III (for places of public accommodation), or enforcement actions under Title II (government facilities). Courts have consistently held that re-striping is readily achievable — making cost an unacceptable defense. Legal fees, remediation costs, and potential civil penalties routinely exceed $5,000–$30,000 or more, versus a compliant re-stripe cost of $100–$700 for most lots.
Where exactly do ADA stalls need to be placed in my lot?
Accessible spaces must be on the shortest accessible route to an accessible building entrance. If the lot serves a building with one main accessible entrance, all required accessible stalls must be near that entrance. If the building has multiple accessible entrances with adjacent parking, accessible stalls must be dispersed to serve each entrance. You cannot cluster all required accessible stalls at the back of the lot for convenience — they must be positioned relative to the accessible entrance(s).
ADA Compliance Costs
Hundreds — Not Thousands.
A free compliance assessment from 633 Asphalt tells you exactly how many accessible stalls your lot requires, which ones are currently non-compliant, and what it costs to fix it — before an ADA complaint tells you the hard way. Most Oklahoma lots are corrected for $100–$700.