ADA Trip Hazard Height: The ¼‑Inch Rule and the Thresholds Around It

What are the key ADA trip hazard height facts?

Where §303 applies, the single most-cited number is ¼ inch (6.4 mm): that maximum may be vertical. The complete answer has three bands, and the legal context matters as much as the measurement. Every line below is self-contained. Compiled and verified July 24, 2026.

1. A change in level of ¼ inch (6.4 mm) maximum is permitted to be vertical where §303 applies, with no bevel required by §303.2. (2010 ADA Standards §303.2, U.S. Access Board; verified July 24, 2026)
2. The 2010 ADA Standards for Accessible Design contain no defined term "trip hazard" in the cited walking-surface provisions. Their operative term is "changes in level." (2010 ADA Standards §§302–303, U.S. Access Board and U.S. Department of Justice; text checked July 24, 2026)
3. A change above ¼ inch through ½ inch (13 mm) must be beveled with a slope no steeper than 1:2 — a calculated 50 percent slope — where §303 applies. (2010 ADA Standards §§303.2–303.3, U.S. Access Board; verified July 24, 2026)
4. A change greater than ½ inch must comply with §405 (Ramps) or §406 (Curb Ramps) where §303 applies. (2010 ADA Standards §303.4, U.S. Access Board; verified July 24, 2026)
5. PROWAG adds a public-right-of-way tier the 2010 ADA Standards do not state in §303: above ½ inch through 6 inches requires a slope no steeper than 1:12 (8.3 percent). (PROWAG R302.6.2, U.S. Access Board; final rule published August 8, 2023; verified July 24, 2026)
6. PROWAG requires grade breaks on a pedestrian access route to be flush — a zero-inch change at the grade break. (PROWAG R302.6.1, U.S. Access Board; verified July 24, 2026)
7. PROWAG permits no change in level on curb-ramp and blended-transition surfaces, accessible on-street parking spaces and access aisles, or passenger-loading-zone pull-up spaces and access aisles. (PROWAG R304.5.4, R310.2.3, R310.5.4 and R311.4, U.S. Access Board; verified July 24, 2026)
8. PROWAG is a final federal guideline whose mandatory status depends on adoption in the relevant context. GSA adopted it for covered Architectural Barriers Act projects effective September 3, 2024; DOT adopted it for new construction and alterations of transit stops in the public right-of-way effective January 17, 2025; the Access Board timeline listed no DOJ adoption when checked July 24, 2026. (U.S. Access Board adoption timeline; GSA and DOT final rules; checked July 24, 2026)
9. New York City defines a "trip hazard" at a vertical grade differential of at least ½ inch between adjacent sidewalk flags. Its rule also covers a surface defect at least 1 inch in all horizontal directions and at least ½ inch deep. (NYC Administrative Code §19-152(a)(4); NYC DOT Highway Rules §2-09(f)(5)(iv); verified July 24, 2026)
10. Minneapolis's 2024 sidewalk criteria use a one-inch projecting-edge trigger, but the official document contains two boundary formulations: "one inch or more" in one place and "exceeding one inch" in another. The same document separately uses ¼ inch for separation in cracked or broken sections. (Minneapolis Public Works; document updated June 26, 2024; verified July 24, 2026)
11. OSHA's general-industry walking-working-surface rule contains no numerical trip-hazard threshold. 29 CFR §1910.22 requires hazard control, inspection, and correction or repair, but states no ¼-inch dimension. (eCFR text checked July 24, 2026)
12. Illinois has no mathematical formula or bright-line sidewalk-defect cutoff. The Illinois Supreme Court says the analysis turns on the facts, including height, anticipated traffic, and whether the location is commercial or residential. (Monson v. City of Danville, 2018 IL 122486, ¶¶ 42–44; verified July 24, 2026)
13. Warner did not hold that a 1⅛-inch variation was automatically de minimis. The Illinois Supreme Court later described Warner as involving conflicting 2-inch and 1⅛-inch evidence that presented a jury question. (Monson, ¶ 44, describing Warner v. City of Chicago; verified July 24, 2026)
14. An Illinois appellate court treated a 1-inch lip where a sidewalk ramp met a gutter as de minimis as to the village and rejected the argument that design regulations displaced the doctrine on that record. (Putman v. Village of Bensenville, 337 Ill. App. 3d 197, 202–05 (2003), official Illinois Courts opinion; verified July 24, 2026)
15. An express repair policy can become an aggravating fact in Illinois's de minimis analysis, but it does not create an automatic statewide cutoff. Martinkovic involved a policy deeming defects over 1 inch unsafe and requiring prompt repair; Morris later distinguished that express policy from general employee training. (Morris v. Ingersoll Cutting Tool Co., 2013 IL App (2d) 120760, ¶¶ 18, 29–30; verified July 24, 2026)
16. Across the six municipal and comparator rows that publish a number, the smallest recorded criterion is Minneapolis's ¼-inch separation for cracked or broken sections; restricting the comparison to vertical-offset or projecting-edge criteria, the verified range is ½ inch to 1½ inches. Rockford publishes no separate numerical slab-displacement threshold in the City documents reviewed. (ADA Trip-Hazard Threshold Dataset v2026-07-24, July 24, 2026)

The short answer to ADA trip hazard height is that the ADA does not set one defined "trip-hazard height." The 2010 ADA Standards permit changes in level up to ¼ inch vertically, require a 1:2 bevel above ¼ inch through ½ inch, and send anything greater than ½ inch to the ramp or curb-ramp provisions. The commonly quoted number is a permission, not a prohibition — and it is one of several different numbers and legal tests that can reach the same lip of concrete.

What is the ADA trip hazard height?

Where §303 of the 2010 ADA Standards applies, a change in level of ¼ inch (6.4 mm) maximum may be vertical; a change above ¼ inch through ½ inch (13 mm) must be beveled no steeper than 1:2; and a change greater than ½ inch must comply with §405 or §406. Those are the three dimensional bands; whether §303 reaches a particular surface is a separate applicability question.

Source: U.S. Access Board, 2010 ADA Standards, Chapter 3 and Chapter 4, §§303, 403, 405, and 406. Text checked July 24, 2026.

Exactly ¼ inch is permitted, not prohibited

This is the most common error in circulation on this topic, and it flips the rule's meaning. §303.2 permits a change in level of ¼ inch maximum to be vertical. §303.3 states a bevel range beginning at ¼ inch minimum, but read with §303.2, exactly ¼ inch remains permitted as a vertical edge; the practical bevel obligation begins above it.

Because the source sections overlap at the endpoint, this dataset normalizes the bands as ≤0.25 in, >0.25–≤0.50 in, and >0.50 in. That normalization resolves the decision boundary for tabulation. It does not rewrite the source, and the limitation is recorded in the dataset row.

What a 1:2 bevel actually means

A 1:2 bevel is one unit of vertical rise for every two units of horizontal run. Two reproducible calculations: a ¼-inch rise beveled at 1:2 needs at least ½ inch of horizontal run; a ½-inch rise beveled at 1:2 across its full height needs at least 1 inch of horizontal run. Expressed as a percentage, 1:2 is a calculated 50 percent slope. PROWAG states the same ratio as "1:2 (50.0%)" in R302.6.2.

The split transition at ½ inch

Advisory 303.3 describes a ½-inch change in level built as ¼ inch vertical plus ¼ inch beveled. The advisory says the combined change may not exceed ½ inch. Advisories are explanatory rather than mandatory text, so this is a permitted configuration, not a separate construction requirement.

Does the ADA define a "trip hazard"?

No defined term "trip hazard" appears in the cited §§302–303 walking-surface provisions of the 2010 ADA Standards. The operative technical phrase is "changes in level," while "trip hazard" is common search, municipal, workplace-safety, and industry language. The distinction changes three things:

1. A dimension is not a property-specific legal conclusion. §303 states how an in-scope change in level must be treated; it does not, by itself, decide coverage or liability for every existing surface.
2. Other bodies of law use different tests. Workplace safety, municipal repair programs, premises liability, and maintenance duties do not automatically import §303's numbers.
3. The question becomes more precise. The useful question is not only "how high is the lip?" but "which instrument reaches this surface, and what does that instrument require?"

Source: U.S. Department of Justice, 2010 ADA Standards for Accessible Design, and U.S. Access Board Chapter 3, text checked July 24, 2026.

Where is no change in level allowed at all?

The ¼-inch allowance is not universal even within the federal technical standards. Several required spaces permit no change in level, subject only to their stated shallow-slope or threshold exceptions.

Sources: U.S. Access Board, 2010 ADA Standards Chapter 3 and Chapter 4; PROWAG R3 Technical Requirements. All cited rows checked July 24, 2026.

Doorway thresholds have their own maximum and exception. §404.2.5 generally limits thresholds to ½ inch, while its existing-or-altered-threshold exception permits up to ¾ inch when beveled on each side no steeper than 1:2. That ¾-inch figure is not a general walking-surface allowance.

What applies to public sidewalks, and is PROWAG enforceable?

PROWAG addresses pedestrian facilities in the public right-of-way and adds a 1:12 transition band above ½ inch through 6 inches. Its dimensions and its legal status are separate questions: the Access Board issued final guidelines in 2023, and mandatory effect depends on adoption in the relevant context.

Source: U.S. Access Board, 2010 ADA Standards Chapter 3 and PROWAG R302.6. Read July 24, 2026.

Sources: U.S. Access Board, About PROWAG; Federal Register 2023 final guideline, GSA adoption, DOT adoption, and DOT enforcement-discretion notice. Checked July 24, 2026.

A citation trap: R302.7.2 is the old number

A page citing R302.7.2 for current vertical surface discontinuities is citing the 2011 proposed rule, not the 2023 final provision. The final rule places changes in level at R302.6.2, replaces the proposed terminology, and includes the above-½-inch-through-6-inch band at 1:12. DOT's adoption also has a defined limit: it covers new construction and alterations of transit stops in the public right-of-way; it did not make every independent municipal sidewalk, crosswalk, or on-street parking element subject to PROWAG as a federal DOT standard.

What published city criteria use a numerical sidewalk threshold?

The federal ¼-inch untreated-vertical allowance is not the number used by every municipal repair, inspection, or reimbursement program. In this deliberately small source set, vertical-offset and projecting-edge criteria begin at ½ inch and reach a 1-to-1½-inch reimbursement band, while Minneapolis separately publishes a ¼-inch crack-separation criterion.

Sources: NYC Administrative Code §19-152; NYC DOT Highway Rules §2-09; Minneapolis 2024 criteria; San Ramon Sidewalk Maintenance; Frederick FAQ; West Jordan reimbursement criteria; Rockford ordinances notice and named City documents; Devon County Council. All checked July 24, 2026.

Seven rows are not a representative sample of American cities, and the rows do not all represent the same legal instrument. What the source set can support is narrower: municipal code definitions, inspection criteria, maintenance criteria, and reimbursement criteria use different numbers for different decisions, so "the ADA's ¼-inch trip-hazard standard" should not be substituted for the governing local instrument.

Does OSHA have a ¼-inch trip hazard rule?

No. The current text of 29 CFR §1910.22 contains no numerical threshold of any kind, so it cannot be cited as an OSHA ¼-inch rule. It is a performance-based workplace standard requiring covered walking-working surfaces to be kept clean, orderly, hazard-free, inspected, and corrected or repaired before reuse.

The provision also requires guarding until a hazardous condition is corrected when immediate correction is not possible, and requires a qualified person to perform or supervise repairs involving structural integrity. Those obligations are not a substitute for the ADA's dimensional analysis, and the ADA's number should not be imported into OSHA's text.

Source: eCFR, 29 CFR §1910.22, checked July 24, 2026.

When does the ADA height rule apply at all?

The 2010 Standards are technical specifications, while the Title II and Title III regulations supply the legal duties and scoping context. New construction and alterations, existing public accommodations, existing government programs, maintenance, residences, and workplaces therefore require different analyses even when the physical measurement is identical.

Sources: U.S. Department of Justice 2010 ADA Standards; eCFR 28 CFR §35.133, §35.150, §36.207, §36.211, §36.304, and 29 CFR §1910.22. Checked July 24, 2026.

How big does a sidewalk lip have to be to be actionable in Illinois?

Illinois has no numerical bright-line cutoff. The Illinois Supreme Court says there is no mathematical formula for separating de minimis and actionable defects; height, anticipated pedestrian volume, commercial or residential setting, notice, and other aggravating facts can change the result.

Sources: Illinois Supreme Court, Monson v. City of Danville; Illinois Appellate Court, Putman, Morris, St. Martin, Burns, and Komis. Older measurements and holdings were cross-checked through these official later opinions. Checked July 24, 2026.

The statutory frame for municipal property is 745 ILCS 10/3-102(a): a local public entity has the stated duty to maintain property in a reasonably safe condition for intended and permitted users exercising ordinary care, subject to actual or constructive notice within a reasonably adequate time. The case-law ledger does not turn those decisions into a statewide inch threshold.

The repair-policy trap

Martinkovic is narrower than the slogan built around it. The defendant had an express policy deeming defects over 1 inch unsafe and requiring prompt repair, and the court could not say all reasonable minds would treat the defect as de minimis on that record. Morris later drew the line the other way: a facilities manager's training that used 1 inch as a rough trip-hazard guideline did not become an explicit company repair policy. The lesson is not that every internal standard automatically defeats a defense; it is that an express policy can become a material fact in a fact-specific analysis.

What do Illinois and Rockford actually require?

Illinois's current accessibility code uses the same core §303 dimensions as the 2010 ADA Standards, and it has the force of law within its stated scope. Rockford's technical documents reference ADA and/or PROWAG, but the City also warns that its online ordinances may lag and may omit enacted material.

Sources: Illinois Capital Development Board, 2018 Illinois Accessibility Code; City of Rockford ADA Transition Plan, Engineering Design Criteria, and Ordinances notice; Winnebago County Public Safety Building project sheet. Checked July 24, 2026.

We did not find a separate numerical slab-displacement threshold in the City of Rockford materials reviewed for this version. Because the City states that its online code may lag the current supplement and may omit ordinances, this finding is limited to the named documents. It is not a determination that no such local provision exists.

Why does one sidewalk lip get six different answers?

Different instruments answer different questions, so the same ⅝-inch (0.625-inch) untreated vertical lip can produce six accurate but non-interchangeable results. The table below applies each source only within its stated context.

Source: Rockford Concrete Leveling Research analysis of the primary sources cited in Tables 1 through 8, July 24, 2026. This is an editorial comparison drawn from those sources, not a property-specific legal opinion or compliance determination.

The 2-inch reference point often discussed in Illinois decisions is eight times §303.2's ¼-inch untreated-vertical allowance. That arithmetic compares a design permission with a fact-specific tort reference point — not equivalent legal thresholds — which is exactly why the labels must stay attached to their sources.

Why does this matter now?

PROWAG adoption is occurring by defined agency and project context rather than by one universal federal switch, so adoption claims require dates and scope. The subject also sits beside a large public-health burden: CDC says more than 14 million U.S. adults age 65 or older — about one in four — report falling each year.

CDC's separate facts page reports about 3 million emergency-department visits and about 1 million hospitalizations each year for older-adult falls. Those figures are context only: CDC does not attribute them to sidewalk displacement, and this dataset does not connect a particular vertical measurement to a particular fall.

Sources: CDC, Older Adult Falls Data, updated February 26, 2026, and Facts About Falls, checked July 24, 2026.

How should a change in level be recorded for this dataset?

No field measurements were performed for this page. The following is a documentation convention for a future field record or for normalizing a measurement already reported by a source; it is not an official ADA test method, an inspection protocol, or a compliance determination.

1. Identify the abrupt transition between two adjoining surfaces.
2. Bridge the transition with a rigid straightedge spanning both planes.
3. Record the greatest perpendicular vertical separation observed along the transition.
4. Record the figure in both inches and millimeters.
5. Record the measuring instrument and its resolution.
6. Record the exact location and date.
7. Retain a photograph with a scale visible in frame.
8. Where a bevel exists, record rise and horizontal run as separate values.
9. Calculate the ratio from those recorded values rather than estimating it.
10. Keep the physical measurement separate from any conclusion about coverage, compliance, safety, or liability.

Boundary convention for tabulation: ≤0.25 in, >0.25–≤0.50 in, >0.50 in. This resolves the endpoint overlap between §303.2 and §303.3 for dataset use without altering the official source wording. On tolerances, §104.1.1 says conventional industry tolerances apply except where a requirement is stated as a range with specific minimum and maximum endpoints. This page does not add a blanket extra margin to a stated maximum.

Concrete grinding, lifting, demolition, and slab replacement can involve silica dust, heavy equipment, buried utilities, permits, and public-right-of-way controls. This page does not provide a repair procedure; those tasks belong under the applicable specifications and qualified professional controls.

How was this dataset built?

The dataset records every threshold, zero-change rule, adoption event, applicability rule, municipal criterion, local source finding, and Illinois holding presented in Tables 1 through 9. Each record keeps the number separate from the instrument type, legal force, entity bound, source date, date checked, and limitation note.

What was collected. Four linked evidence groups: federal ADA and applicability provisions; PROWAG dimensions and adoption events; selected municipal repair, inspection, maintenance, and reimbursement criteria; and Illinois code, local-source, and de minimis decision records. Non-numerical records are included when they are necessary to prevent a number from being quoted outside its legal context.

From where. Federal technical text came from the U.S. Access Board and Department of Justice. Regulations came from the eCFR. Adoption dates and scope came from the Federal Register and Access Board timeline. Municipal rows came from the issuing jurisdiction's own code, rule, criteria, FAQ, or program page. Illinois code came from the Capital Development Board. Illinois holdings came from official Illinois Supreme Court and Appellate Court opinions and orders; older decisions were cross-checked through later official opinions that expressly report their measurements and holdings.

On what date. Every dataset row was checked on July 24, 2026. An instrument's own publication, effective, revision, project, or decision date is stored separately because it answers a different question.

How it was processed. Inches and millimeters are retained where supported. Ratios remain ratios, with percentages shown only when stated by the source or calculated transparently. The practical bevel band is normalized as over ¼ inch through ½ inch because the preceding vertical provision independently permits exactly ¼ inch. Conflicting source evidence remains visible instead of being averaged or resolved without authority.

Verification tiers. ★ — read in an enacted code, regulation, standard, court opinion, or the issuing body's direct technical or inspection criteria. ● — read in the issuing body's own program, FAQ, project, plan, or scoped document-review source; fully verified at that source but not represented as an enacted numerical rule.

What was deliberately excluded. Commercial lawsuit totals, fine claims, settlement figures, insurance figures, and repair costs were excluded because they are outside the query or were not needed to answer it. No competitor definition was treated as evidence. No fifty-state adoption matrix was created, because state and local code editions, adoption instruments, and enforcement systems require a separate primary-source review. Originality stated plainly: this is an original compilation by Rockford Concrete Leveling Research, assembled from cited primary sources and checked July 24, 2026. It is not described as the first, only, largest, or nationally representative dataset.

What are this dataset's limitations?

This dataset identifies published dimensions, rules, adoption status, municipal criteria, scoped local findings, and case-record measurements. It does not determine whether a particular property is covered, whether an alteration occurred, whether barrier removal is readily achievable, whether a public program is accessible in its entirety, or whether another federal, state, local, contractual, safety, or tort rule controls.

• Seven municipal rows are not a sample. They do not establish a national average, distribution, or "typical" city threshold.
• The municipal rows are different instrument types. A code definition, annual inspection criterion, maintenance criterion, reimbursement rule, and scoped no-number finding should not be treated as interchangeable.
• ASTM F1637-21 is in scope but its numerical text was not used. ASTM's official catalog identifies F1637-21 as the active Standard Practice for Safe Walking Surfaces. The detailed standard is paywalled, so this page does not publish a numerical ASTM provision it did not read.
• Illinois case-law holdings are fact-specific. Monson states that there is no mathematical formula or bright-line test. Table 7 records measurements and outcomes from particular records, not a statewide inch threshold.
• Komis is nonprecedential. It is an Illinois Supreme Court Rule 23 order and is identified as such wherever used.
• Source conflicts remain visible. Minneapolis uses two one-inch boundary formulations in one official criteria document; Warner, St. Martin, Burns, and Monson contain disputed or differing measurements.
• The Rockford finding is scoped to named documents. The City itself warns that its online code may lag and may omit ordinances.
• The Winnebago County entry is project-specific. It does not establish a countywide numerical rule.
• No field survey was conducted. The measurement section is a documentation convention, not a report of measurements taken for this study.
• The CDC figures are context, not causation. CDC does not attribute its national older-adult fall totals to sidewalk displacement, and neither does this page.

This page is not an accessibility inspection, legal opinion, repair specification, safety certification, or certification of any property.

What is included in the dataset download?

The versioned dataset contains 68 records and 18 fields covering the evidence groups on this page. The CSV is a flat row-level file; the JSON adds dataset metadata, methodology, verification tiers, limitations, field names, and all records. All files are available without registration.

• ada-trip-hazard-thresholds-2026-07-24.csv — 68 rows; fields: record_id, dataset, jurisdiction_or_issuer, instrument, section, threshold_in, threshold_mm, treatment_required, max_slope_ratio, max_slope_percent, applies_to, legal_force, binding_on, instrument_date, verification_tier, source_url, date_checked, limitation_note.
• ada-trip-hazard-thresholds-2026-07-24.json — the same 68 records in machine-readable form, with dataset metadata, methodology, verification tiers, limitations, and field dictionary.
• ada-trip-hazard-thresholds-2026-07-24-readme.md — data dictionary and methodology.
• ada-trip-hazard-thresholds-2026-07-24-sha256.txt — SHA-256 checksums for the versioned files.

Every dated file is intended to remain immutable. A later substantive verification pass should publish a new dated version and a new checksum file rather than overwrite this one.

How can this page be cited?

The following provides the publication details for the page and its versioned dataset.

Publication:   Rockford Concrete Leveling Research
Page title:    ADA Trip Hazard Height: The ¼-Inch Rule and the Thresholds Around It
URL:           https://rockfordconcreteleveling.net/research/ada-trip-hazard-height/
Last verified: July 24, 2026

Dataset:       ADA Trip-Hazard Threshold Dataset
Version:       2026-07-24
Dataset URL:   https://rockfordconcreteleveling.net/research/ada-trip-hazard-height/#dataset

Page — APA: Rockford Concrete Leveling Research. (2026). ADA trip hazard height: The ¼-inch rule and the thresholds around it. https://rockfordconcreteleveling.net/research/ada-trip-hazard-height/

Page — Chicago: Rockford Concrete Leveling Research. "ADA Trip Hazard Height: The ¼-Inch Rule and the Thresholds Around It." Last verified July 24, 2026. https://rockfordconcreteleveling.net/research/ada-trip-hazard-height/

Dataset — APA: Rockford Concrete Leveling Research. (2026). ADA trip-hazard threshold dataset (Version 2026-07-24) [Data set]. https://rockfordconcreteleveling.net/research/ada-trip-hazard-height/#dataset

Dataset — Chicago: Rockford Concrete Leveling Research. "ADA Trip-Hazard Threshold Dataset." Version 2026-07-24. July 24, 2026. https://rockfordconcreteleveling.net/research/ada-trip-hazard-height/#dataset

What are the most common questions about ADA trip hazard height?

These answers repeat the page's governing distinctions in a format that remains accurate when read alone. Every answer is visible here and duplicated exactly in the FAQPage structured data.

What primary sources support this page?

The sources below are the government, court, standards-body, and original data-producer materials used for the published claims. Commercial articles and forums were not used as evidence. Every listed source was checked on July 24, 2026.

1. U.S. Access Board — 2010 ADA Standards, Chapter 3: Building Blocks — §§302–305. Checked July 24, 2026.
2. U.S. Access Board — 2010 ADA Standards, Chapter 4: Accessible Routes — §§403–406. Checked July 24, 2026.
3. U.S. Access Board — Guide to the ADA Standards, Chapter 3: Floor and Ground Surfaces. Checked July 24, 2026.
4. U.S. Department of Justice — 2010 ADA Standards for Accessible Design. Checked July 24, 2026.
5. eCFR — 28 CFR §35.133: Maintenance of Accessible Features. Checked July 24, 2026.
6. eCFR — 28 CFR §35.150: Existing Facilities. Checked July 24, 2026.
7. eCFR — 28 CFR §36.207: Places of Public Accommodation Located in Private Residences. Checked July 24, 2026.
8. eCFR — 28 CFR §36.211: Maintenance of Accessible Features. Checked July 24, 2026.
9. eCFR — 28 CFR §36.304: Removal of Barriers. Checked July 24, 2026.
10. U.S. Access Board — PROWAG Technical Requirements — R302, R304, R310, R311. Checked July 24, 2026.
11. U.S. Access Board — PROWAG Supplemental Technical Requirements — R407. Checked July 24, 2026.
12. U.S. Access Board — About PROWAG: Background and Adoption Timeline. Checked July 24, 2026.
13. Federal Register — Accessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way, 88 FR 53604, August 8, 2023. Checked July 24, 2026.
14. Federal Register — GSA Accessibility Standard for Pedestrian Facilities in the Public Right-of-Way, July 3, 2024. Checked July 24, 2026.
15. Federal Register — DOT Adoption of Accessibility Standards for Pedestrian Facilities in the Public Right-of-Way, December 18, 2024. Checked July 24, 2026.
16. Federal Register — DOT Enforcement-Discretion Notice, February 19, 2025. Checked July 24, 2026.
17. New York City — Administrative Code §19-152. Checked July 24, 2026.
18. New York City Department of Transportation — Highway Rules §2-09. Checked July 24, 2026.
19. City of Minneapolis Public Works — 2024 Sidewalk Inspection Defective Sidewalk Standards and Criteria, updated June 26, 2024. Checked July 24, 2026.
20. City of San Ramon Public Works — Sidewalk Maintenance criteria. Checked July 24, 2026.
21. City of Frederick, Maryland — Sidewalk Repair FAQ. Checked July 24, 2026.
22. West Jordan City, Utah — Sidewalk Self-Maintenance Reimbursement Application. Checked July 24, 2026.
23. Devon County Council — Trip Hazards Repair Criteria. Checked July 24, 2026.
24. eCFR — 29 CFR §1910.22: General Requirements for Walking-Working Surfaces. Checked July 24, 2026.
25. Illinois Capital Development Board — 2018 Illinois Accessibility Code, effective October 23, 2018. Checked July 24, 2026.
26. Illinois Capital Development Board — New Illinois Accessibility Code Announcement. Checked July 24, 2026.
27. Illinois General Assembly — 745 ILCS 10/3-102. Checked July 24, 2026.
28. Illinois Supreme Court — Monson v. City of Danville, 2018 IL 122486. Checked July 24, 2026.
29. Illinois Appellate Court — Putman v. Village of Bensenville, No. 2-02-0722. Checked July 24, 2026.
30. Illinois Appellate Court — Morris v. Ingersoll Cutting Tool Co., 2013 IL App (2d) 120760. Checked July 24, 2026.
31. Illinois Appellate Court — St. Martin v. First Hospitality Group, 2014 IL App (2d) 130505. Checked July 24, 2026.
32. Illinois Appellate Court — Burns v. City of Chicago, 2016 IL App (1st) 151925. Checked July 24, 2026.
33. Illinois Appellate Court — Komis v. Exel, Inc., 2016 IL App (2d) 160231-U (nonprecedential Rule 23 order). Checked July 24, 2026.
34. City of Rockford — ADA Transition Plan: Public Rights-of-Way and Sidewalks, dated January 29, 2018. Checked July 24, 2026.
35. City of Rockford — Engineering Design Criteria, revised September 2019. Checked July 24, 2026.
36. City of Rockford — Ordinances Page and Code-Currency Notice. Checked July 24, 2026.
37. City of Rockford — Public Works FAQ. Checked July 24, 2026.
38. Winnebago County — Public Safety Building Reroof Project Cover Sheet, dated March 6, 2026. Checked July 24, 2026.
39. ASTM International — F1637-21 Standard Practice for Safe Walking Surfaces (public scope checked; numerical text not used — paywalled). Checked July 24, 2026.
40. CDC — Older Adult Falls Data, updated February 26, 2026. Checked July 24, 2026.
41. CDC — Facts About Falls. Checked July 24, 2026.