Parking Lot
ADA Access Aisle Striping: Width, Markings & Stripe Spec
Cojo
May 30, 2026
6 min read
The striped, diagonally hatched area next to an accessible parking space is the access aisle, and it is the single most misunderstood part of an accessible stall. People treat it as wasted pavement or, worse, as an extra place to squeeze a car. It is neither. The aisle is the room a person needs to deploy a ramp or lift, transfer to a wheelchair, and move clear of the vehicle. Stripe it wrong and the space fails, no matter how perfect the stall beside it looks.
Our ADA parking compliance guide for Oregon covers the whole accessible-parking picture. This page drills into the aisle itself: how wide, how marked, and how to paint it so it actually works.
There are two widths, and which one you use depends on whether the adjacent space is a standard accessible space or a van-accessible space.
| Adjacent Space Type | Minimum Access Aisle Width |
|---|---|
| Standard accessible | 5 feet |
| Van-accessible (8-ft space option) | 8 feet |
Van-accessible layouts have a second option: an 11-foot-wide space paired with a 5-foot aisle instead of an 8-foot space with an 8-foot aisle. Either combination totals 16 feet. The wider aisle is generally the more flexible choice in tight lots, and our page on van-accessible spaces in Oregon compares the two options in detail.
A blank aisle reads to drivers as open pavement. The markings are what tell people to keep it clear.
The standard line width for the hatching and borders follows the same 4-inch convention used for the rest of the lot's striping. Our Oregon ADA striping requirements for 2026 page covers the paint and layout specs in full.
You do not need a separate aisle for every accessible space. Two accessible spaces can share a single access aisle placed between them, with one space on each side. This is the most space-efficient layout and it is fully compliant as long as the aisle meets the width required by the wider of the two adjacent spaces.
If one of the two shared spaces is van-accessible, the shared aisle must be 8 feet wide to satisfy the van requirement. You cannot give a van space a 5-foot aisle just because it is sharing with a standard space. The aisle always defaults to the most demanding space it touches.
Width and markings are the visible part. Three requirements are easy to miss because they involve how the aisle sits in the lot, not how it is painted:
These are the aisle errors that show up most often during a compliance review:
Every one of these is correctable during a restripe, and most are layout decisions rather than construction. The dimensions of the spaces those aisles serve are covered in our ADA parking stall dimensions guide.
Oregon's rainy season and UV exposure fade traffic paint faster than many owners expect. A perfectly striped aisle that has faded to 40 percent visibility is functionally the same as an unmarked aisle in the eyes of an auditor. That is why aisle hatching should be inspected at least annually and repainted before it disappears. Pairing aisle restriping with a sealcoat gives the paint a clean, dark surface to bond to and improves contrast for the blue and white markings.
This is general guidance, and every lot is different. Aisle width, placement, and slope all depend on your specific layout, which is why a site survey beats any spec sheet. A contractor who measures the lot before painting catches the narrow aisle or the wrong-side placement before it becomes a violation.
Understand what happens during an ADA parking compliance audit, common violations found in Oregon commercial lots, and how to prepare your property.
Complete guide to ADA parking requirements in Oregon, including space dimensions, van accessible standards, signage rules, and ORS 447.233 specifics for commercial property owners.
See real before-and-after results of commercial sealcoating projects in Oregon and learn how this affordable maintenance extends parking lot life by a decade or more.
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