Parking Lot
ADA Accessible Route: Connecting Parking to the Door
Cojo
May 30, 2026
6 min read
A perfectly striped accessible parking space connected to nothing is not accessible. The space exists so a person can park, but the point of parking is to reach the building. The continuous path from the accessible space to the entrance is the accessible route, and it is just as much a compliance requirement as the space itself. A lot can have flawless accessible spaces and still fail because the route from them is broken.
This page covers what makes an accessible route compliant: width, slope, surface, curb ramps, and the detectable warnings where pedestrian paths meet vehicle traffic. Our ADA parking compliance guide for Oregon covers the full standard; this page focuses on the path of travel.
The accessible route is the continuous, unobstructed path that links the elements of a site a person needs to use. From the parking lot's perspective, it connects:
"Continuous" is the operative word. The route cannot have gaps, dead-ends, or segments that force a person off the accessible path. If any single link breaks, the whole route fails, even if the rest is perfect.
The accessible route has dimensional requirements that govern whether a wheelchair or mobility device can actually use it.
A route that meets width but exceeds slope, or vice versa, is non-compliant. Both have to be right along the entire length.
The route surface must be firm, stable, and slip-resistant. That rules out loose gravel, deteriorated asphalt with crumbling aggregate, and surfaces that become slick. It also sets limits on the imperfections that create trip and roll hazards:
In Oregon, freeze-thaw and the long rainy season degrade route surfaces, so a route that was compliant when built can develop trip hazards and ponding over the years. The route deserves the same monitoring as the accessible spaces themselves.
When the accessible route has to move between a parking surface and a sidewalk, the transition is made with a curb ramp, not a curb. Curb ramps have their own requirements: a running slope generally capped at a defined maximum, flared sides where pedestrians cross them, a level landing at the top, and a width adequate for the route.
A curb that interrupts the route without a ramp is a hard barrier. So is a curb ramp that is too steep, too narrow, or lacks a landing. Many older lots have accessible spaces that connect to a sidewalk only over a full-height curb, which silently breaks the route. Correcting that means installing a proper curb ramp.
Where the accessible route crosses into a zone of vehicular traffic, or transitions at certain curb ramps, the standard calls for detectable warnings: the truncated-dome surface that a person using a cane or with low vision can feel and see. These warn that the pedestrian path is about to meet vehicle traffic.
Detectable warnings have specific requirements for dome size, spacing, contrast, and placement, and getting the placement right is its own topic, which we cover in our detectable warning and curb cut placement page. Missing or incorrectly placed detectable warnings are a common gap on routes that otherwise look fine.
Accessible routes fail in predictable ways:
Each of these is correctable, but the fix depends on the cause. A surface issue is repair; a missing ramp is construction; a slope issue may be regrading. An ADA compliance audit process identifies which links in the route are broken and what each needs.
The accessible route is easiest to get right when it is planned together with the parking layout, not bolted on afterward. Accessible spaces should be placed where the shortest, flattest route to the entrance is achievable, so the route does not have to fight the lot's grade or cross unnecessary traffic. When a lot is being striped, paved, or reconfigured, that is the moment to verify the route end to end.
This is general guidance, and the specifics, route length, slope, curb ramp placement, depend on your site. A survey that walks the full path from accessible space to door is the way to confirm the route works.
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.
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