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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →A temporary walkway is safe only when people can find it, travel its entire length, negotiate every curb and level change, and pass without encountering unstable surfaces, obstacles, or hidden drop-offs. Start by identifying the rule set for the site, then design a continuous alternate route, install it as a complete system, and inspect it whenever construction or weather changes the conditions. In a public right-of-way, the U.S. Access Board’s Public Right-of-Way Accessibility Guidelines (PROWAG) generally require an alternate pedestrian access route when construction, maintenance, or closure makes the normal path inaccessible. Technical infeasibility can allow an alternate means of access, but that exception should be documented with the approving authority rather than assumed.
1. Establish which accessibility requirements apply
Do not select a mat, ramp, barrier, or sign until you know whether the walkway is in a public right-of-way or on another type of covered property. The governing context affects width, grades, curb treatments, communication, and who must approve the traffic-control arrangement.
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Public right-of-way: use the PROWAG framework
PROWAG R204.1 addresses temporary loss of access directly: “When a pedestrian circulation path is temporarily not accessible due to construction, maintenance operations, closure, or other similar conditions, an alternate pedestrian access route must be provided and comply with R303 and R402.” This applies to pedestrian facilities in the public right-of-way when the guideline is the applicable requirement for the project. The alternate route must remain usable through the work, not merely exist on the first day.
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Other covered settings: check the ADA Standards and project rules
A temporary route at a private facility, commercial property, institutional campus, or other covered setting may be governed by the ADA Standards for Accessible Design, state building codes, local requirements, an owner’s standard, or a contract specification rather than PROWAG alone. The ADA Standards contain their own scope, exceptions, and provisions for accessible walking surfaces. A dimension that is correct for a public street detour is not automatically the correct dimension for an interior or site route.
Confirm the approving authority before work starts
Ask the owner, design professional, building official, transportation agency, or permit issuer which documents control. Check the permit, approved traffic-control plan, temporary traffic-control details, accessibility specifications, and any state or municipal supplements. If requirements conflict, obtain a written direction before installing the route. The reviewed federal guidance does not establish the complete requirements for every state or municipality.
| Decision point | Public right-of-way route under PROWAG | Other ADA-covered setting |
|---|---|---|
| When an existing pedestrian path is closed | Provide an alternate pedestrian access route that complies with the applicable PROWAG provisions, unless a documented technical-infeasibility situation requires an alternate means. | Provide an accessible route under the ADA Standards and any applicable building, site, or contract requirements. |
| General clear-width reference | 48 inches minimum continuous clear width for an alternate pedestrian access route, with an exception when an existing pedestrian circulation path is used. | ADA Standards generally use a 36-inch minimum for accessible walking surfaces, subject to a limited exception and the rest of the applicable criteria. |
| Passing space | When the route is less than 60 inches wide, passing spaces are required at intervals no greater than 200 feet under PROWAG. | Use the dimensions and spacing required by the ADA Standards and the project’s adopted requirements; do not import PROWAG spacing automatically. |
| Grades and curb transitions | Apply PROWAG right-of-way grade, ramp, blended-transition, and crossing provisions, including their stated exceptions. | Apply the ADA Standards provisions for the particular facility and route, along with local requirements. |
| Approval | Usually the public agency or authority responsible for the right-of-way, permit, or traffic-control plan. | The property owner, design professional, building official, or other authority named by the project documents. |
2. Map a continuous route before closing the normal path
Walk the proposed detour from every approach, including the direction used by a person who cannot see the work area. Mark the starting point, each decision point, the destination, crossings, driveways, transit stops, entrances, and places where fencing or equipment could move. A route that is accessible for one block but ends at an unprotected curb or a stack of materials is not an accessible route.
Place information before the decision point
Install advance signs before a person reaches the blocked section, not beside the barricade after a choice has already been missed. The sign sequence should direct people to the same route from each approach and remain readable after every stage change. In a public right-of-way, PROWAG also requires a non-visual way to convey information identifying the alternate route. Coordinate the method with the approving agency and make sure it remains available when visual signs are obscured or a person cannot use them.
Keep the route separated from the work
Use a continuous edge, detectable barrier, or other approved separation wherever pedestrians could enter an excavation, moving-vehicle area, storage zone, or sudden level change. Do not rely on a single cone or a length of caution tape to define the path. Anchor or ballast temporary devices as required by the approved plan, and check that their feet, bases, and fasteners do not reduce the usable width.
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Connect every segment
Trace the route on the plan and in the field without stepping over a gap. Include the approach surface, any temporary walkway panel, every curb or driveway crossing, and the return to the permanent sidewalk. Verify that gates, fence doors, and crossings can be opened or used without forcing a person into the work area. If construction phases will move the route, show each phase separately and identify when the signs and barriers change.
3. Set clear width and provide passing space
Apply the PROWAG alternate-route width correctly
For an alternate pedestrian access route in the public right-of-way, PROWAG R303.4 sets a 48-inch minimum continuous clear width, excluding curb width. If the alternate route uses an existing pedestrian circulation path, its width must be at least the width of the path that was temporarily closed. Measure between the usable faces of barriers, rails, signs, equipment, and other encroachments; do not measure the nominal width of a panel or mat.
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Add passing spaces when the route is narrow
When the PROWAG route is less than 60 inches wide, provide passing spaces at intervals no greater than 200 feet under R302.3. Locate each space where people can see it and reach it without stepping into the work area. A widening that is blocked by a sign base, drainage channel, or stored material is not a usable passing space. Confirm the dimensions and configuration with the agency’s detail because the cited spacing rule does not replace other route requirements.
Do not substitute the ADA baseline without checking context
The ADA Standards generally specify a 36-inch minimum for accessible walking surfaces, with a limited exception. That figure belongs to the ADA context and does not erase the PROWAG 48-inch requirement for an alternate public-right-of-way route. Conversely, a public agency may impose a wider dimension through its standard details or permit. Use the requirement that actually governs the project.
4. Build a stable, firm, slip-resistant walking surface
PROWAG R302.6 states that accessible walking surfaces, elements, and spaces must be stable, firm, and slip resistant. In practical terms, the route should not rock, sink, roll, become slick when wet, or develop an edge that catches a cane, crutch, walker, or wheelchair caster.
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Prepare the base and secure the surface
- Remove loose debris, mud, protruding fasteners, and abrupt ridges before placing panels or mats.
- Use a base that remains supported under expected pedestrian loads and weather; a panel spanning a soft trench edge can flex or shift even when its top appears level.
- Join adjacent units so wheels and mobility devices do not encounter a lip, open joint, or gap.
- Prevent movement with the attachment or edge treatment specified by the approved system. Recheck it after delivery traffic, vibration, rain, or freezing conditions.
- Provide drainage so water does not pond on the route or freeze into a slippery surface.
Control running and cross slope
For ADA accessible walking surfaces, the cited limits are a maximum running slope of 1:20 (5 percent) and a maximum cross slope of 1:48, approximately 2.1 percent. Measure the installed route, not just the drawing. PROWAG has its own right-of-way grade rules and exceptions, including conditions related to the adjacent street and crossing context, so use the applicable PROWAG detail where the project is in a public right-of-way.
Make grade breaks flush
At the ends of panels, mats, ramps, and temporary pavement, eliminate abrupt vertical changes. A surface can satisfy a nominal width while still being unusable if a wheelchair front caster catches at a joint or a cane tip drops into a gap. Re-level or replace components that settle, curl, or separate.
5. Treat curbs and level changes as part of the route
A detour fails at its highest or lowest point if the curb crossing is inaccessible. Wherever the alternate route crosses a curb, provide the compliant curb ramp or blended transition required for that route. Continue the clear path across the landing and into the street or sidewalk connection.
Check the installed ramp, not the product label
A portable wheelchair ramp is a product category that may help bridge a temporary height difference, but portability does not establish compliance. Assess the installed configuration for clear width, running slope, cross slope, surface, edge protection, top and bottom transitions, stability, and the requirements of the approving authority. A ramp that fits the catalog description can still be too steep for the actual rise, leave a lip at the threshold, or narrow the route with its side rails.
Survey each transition after settlement
Measure the rise again after the supporting surface has been loaded and after rain or excavation work. Confirm that the ramp remains seated, does not rock, and has not been undermined. Keep the landing free of tools, hoses, cords, and sign bases. If the route must cross a driveway or temporary vehicle access, coordinate the transition and protection with the traffic-control plan rather than improvising a board or plate.
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6. Remove overhead, protruding, and detectable hazards
Maintain vertical clearance
PROWAG R402.4 requires at least 80 inches of vertical clearance along the pedestrian route. Where clearance is lower, provide a guard or barrier that prohibits travel into the low area and has its lowest edge no higher than 27 inches so it can be detected by a cane. Inspect for scaffold braces, temporary signs, tree limbs, lighting, and suspended utilities as the work progresses.
Control objects that intrude into the path
Keep the required clear width free of posts, braces, rails, hoses, cords, waste containers, and material stacks. PROWAG also limits certain objects protruding into the pedestrian path. Position supports outside the route where possible; otherwise use the barrier or edge treatment required by the applicable detail. Never narrow the route to make room for a convenience item without rechecking the width and passing-space plan.
Protect edges and openings
Where a person could leave the route and enter an excavation, traffic lane, or drop-off, use a continuous approved barrier. Check the bottom edge for cane detectability and ensure the barrier cannot be pushed into the walking area. Replace damaged panels immediately rather than marking them and leaving the hazard in service.
7. Sign and communicate the detour throughout construction
Signs are part of the accessible route, not a one-time setup task. Place advance route information before each decision point, repeat it where a person could turn toward the closure, and update it when the route moves. Keep signs visible, stable, and outside the clear width. Remove obsolete signs so two directions are not presented at once.
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For a public-right-of-way detour, provide the required non-visual information identifying the alternate route. The agency may specify the acceptable method and location. Coordinate installation with the permit holder and test the route from the approaches used by people with vision disabilities.
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When fencing, equipment, weather, or a construction stage changes the path, walk the sign sequence in both directions. A sign that points correctly in the morning can become misleading after a fence panel moves or a crossing closes.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.8. Install the walkway as a controlled sequence
- Confirm the governing documents. Obtain the approved route, traffic-control plan, accessibility details, permits, and contact for field decisions.
- Survey the existing path. Record available width, curb heights, slopes, overhead clearance, drainage, driveways, and destination connections before closing anything.
- Set the route and barriers first. Establish the complete pedestrian corridor and its separation from work before removing the permanent path.
- Prepare the base. Remove debris and stabilize the support so panels, mats, or temporary pavement will not rock or settle.
- Install surface units and transitions. Join edges, secure components, and address every curb, threshold, and level change with the approved ramp or blended transition.
- Measure the installed route. Check continuous clear width, any required passing spaces, running and cross slopes, joints, and vertical clearance.
- Install signs and non-visual route information. Place information before decision points and verify that signs do not encroach on the path.
- Walk the route before opening it. Use the same approaches and crossings a pedestrian will use; look for blocked edges, slippery areas, gaps, and confusing choices.
- Document acceptance. Photograph or record the completed route and obtain the required owner or agency approval before directing the public onto it.
- Release the route in phases. When work advances, close the old segment only after the next complete segment, barriers, transitions, and signs are ready.
9. Inspect and maintain the route as work changes
The cited standards establish the route’s performance criteria but do not prescribe a universal inspection frequency. Set a practical inspection process in the project plan and increase checks whenever conditions change.
Inspect at predictable trigger points
- Before opening the route each day or shift, according to the project’s safety procedure.
- After fencing, scaffolding, equipment, deliveries, or material storage moves.
- After rain, snow, freezing temperatures, flooding, or a washout.
- When a construction phase changes a curb, crossing, entrance, or sign location.
- After a complaint, near miss, collision, vandalism, or report of a loose panel.
Use a full-route inspection record
Record the date, inspector, weather or site change, measured deficiencies, corrective action, and time restored. Recheck the entire route rather than only the reported location. Confirm that the alternate path is still continuous, signs still direct people correctly, surfaces remain stable and slip resistant, width and passing spaces are unobstructed, transitions are flush, and overhead or protruding hazards remain controlled.
Correct immediately when the route is compromised
If a defect cannot be corrected at once, protect the location, notify the responsible authority, and provide the approved alternate means of access. Do not leave a person to discover a new route around an obstruction. Reopen the original path only when it is complete and the temporary controls can be removed safely.
10. Troubleshoot common failures
| Observed problem | Likely cause | Corrective action |
|---|---|---|
| The route measures less than the required clear width | Barrier feet, sign bases, rails, or stored materials are inside the measured corridor. | Move the encroachment, widen the route, or revise the approved layout; remeasure between the actual usable faces. |
| People cannot tell where the detour starts | Signs begin at the closure, point in only one direction, or were not moved with the route. | Place advance information before each decision point, remove conflicting signs, and coordinate required non-visual information. |
| Panels rock or separate | Soft or uneven base, inadequate joining, settlement, or vehicle impact. | Close or protect the affected segment, reset the base and connections, then inspect the full route before reopening. |
| A curb ramp is too steep or has a lip | The portable unit was chosen without measuring the installed rise and landing. | Recalculate the installed geometry, provide the applicable compliant ramp or blended transition, and obtain approval for the revised detail. |
| Water or ice makes the surface slippery | Poor drainage, displaced panels, mud, or weather exposure. | Remove the hazard, restore drainage and stable support, and add the weather response required by the project plan. |
| A brace or sign hangs into the path | Work-stage changes were not reflected in the route layout. | Relocate the object or install the required guard or barrier; verify the 80-inch clearance rule and cane-detectable edge treatment where applicable. |
| The detour ends at an inaccessible destination | Only the closed sidewalk segment was considered; the connection at the far end was not surveyed. | Extend the route to a usable entrance, crossing, or sidewalk connection and update signs at both approaches. |
11. Choose temporary equipment by installed performance
Evaluate temporary walkway panels, mats, ramps, barriers, and signs as components of one route. The official materials cited here do not identify a preferred product model or certify any generic system. Ask the supplier for dimensions, surface characteristics, joining and anchoring details, load information, and instructions for the conditions on your site, then verify the assembled installation against the governing requirements.
For a ramp or curb-transition product, compare the actual rise to the available run, clear width, side-edge treatment, surface when wet, top and bottom transitions, and compatibility with the route’s barriers. Confirm that the product will not consume required width or create a protruding hazard. Obtain the approving authority’s acceptance where the permit or contract requires it.
12. Final field authorization
Before directing pedestrians onto the temporary route, the responsible project representative should be able to answer yes to each applicable question:
- Has the authority and standard governing this location been identified?
- Does the route connect the original approaches and destination without a break?
- Are required width, existing-path, and passing-space provisions satisfied?
- Are surfaces stable, firm, slip resistant, properly supported, and free of abrupt joints?
- Do running slope, cross slope, curb ramps, and blended transitions meet the applicable provisions?
- Are overhead clearance, protruding objects, barriers, and edge protection addressed?
- Are advance signs and required non-visual route information installed and still accurate?
- Is there a named person responsible for inspections, corrections, and phase changes?
- Has the completed route been reviewed and accepted under the permit, contract, or agency process?
Keeping a temporary accessible walkway safe is an operating obligation for the entire construction phase. Design the alternate route before the closure, verify its installed dimensions and transitions, communicate it from every approach, and treat every change in work or weather as a reason to inspect the route again.
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