When Is High-Visibility Clothing Required?
Header image: MassDOT
Quick Answer
High-visibility clothing is required whenever workers are exposed to traffic or moving equipment. OSHA specifically requires it for flaggers and for workers near excavations exposed to public traffic, and it uses the General Duty Clause for other highway work zone crews. The federal MUTCD requires ANSI/ISEA 107 Performance Class 2 or 3 apparel for anyone working in the right-of-way.
Why High-Visibility Clothing Requirements Exist
Getting hit by a vehicle is one of the most common ways workers die on the job. In the BLS Census of Fatal Occupational Injuries (released February 19, 2026), transportation incidents were the most frequent fatal event in 2024, accounting for 38.2 percent of all occupational deaths. Pedestrian incidents involving motor vehicles rose 19.0 percent, to 369 deaths.
Work zones carry their own share. The Federal Highway Administration's work zone facts and statistics report 891 work zone traffic fatalities in 2022 and 94 highway worker deaths at road construction sites that year (FARS data as reported by NHTSA as of April 2024). High-visibility safety apparel (HVSA) does one job: it makes a worker detectable and recognizable as a person, sooner, in daylight and at night. Seconds of extra warning give drivers and equipment operators time to react.
.jpg)
OSHA High-Visibility Clothing Requirements
OSHA's construction standards name two specific situations where hi-vis garments are mandatory:
- Flaggers. Under 29 CFR 1926.201(a), signaling by flaggers, "including warning garments worn by flaggers," must conform to Part 6 of the Manual on Uniform Traffic Control Devices (MUTCD).
- Excavations near traffic. Under 29 CFR 1926.651(d), employees exposed to public vehicular traffic "shall be provided with, and shall wear, warning vests or other suitable garments marked with or made of reflectorized or high-visibility material."
For everyone else in a highway or road construction work zone, OSHA relies on the General Duty Clause. In its letter of interpretation on high-visibility garments in highway work zones, OSHA states that section 5(a)(1) of the OSH Act requires construction workers in road work zones to be protected from road and construction traffic by wearing high-visibility garments. OSHA's Highway Work Zones and Signs, Signals, and Barricades page collects the related standards and guidance.
Underneath all of it sits the general PPE duty. OSHA's 29 CFR 1926.95 requires protective equipment wherever hazards are capable of causing injury, and 29 CFR 1926.28(a) makes the employer responsible for requiring workers to wear it.
MUTCD High-Visibility Apparel Requirements For Roadway Work
The Manual on Uniform Traffic Control Devices is the federal standard for traffic control on roads open to public travel, including temporary traffic control (TTC) zones. The current edition is the 11th Edition with Revision 1, dated December 2025, according to the FHWA MUTCD 11th Edition page. Its high-visibility apparel provision (Section 6C.05) requires workers in the right-of-way within a TTC zone to wear apparel meeting ANSI/ISEA 107 Performance Class 2 or 3. That covers flaggers, laborers, inspectors, and supervisors, day or night.
One wrinkle for safety managers: OSHA's flagger rule still incorporates Part 6 of the 2009 MUTCD by reference, while FHWA works from the 11th Edition. In practice, the answer is the same. Anyone on foot near live traffic wears Class 2 at minimum, and Class 3 when conditions call for more.
When To Use Class 2 vs. Class 3 High-Visibility Clothing
The ANSI/ISEA 107 standard sorts garments by Type and Performance Class. For roadway work you are choosing between Type R Class 2 and Type R Class 3. The Radians white paper on ANSI/ISEA 107-2020 summarizes the intent:
- Class 2 adds more high-visibility material than Class 1 and suits most roadway construction, municipal crews, and airport ramp workers.
- Class 3 adds background and retroreflective material on sleeves and pant legs for visibility through a full range of motion. It is the usual choice for flaggers, nighttime work, and DOT projects. A sleeveless vest alone is never Class 3.
Move up to Class 3 when traffic speeds are high, the work is at night or in poor weather, the background is cluttered, or the worker's attention is on the task rather than traffic. For the full breakdown, read ANSI 107 explained.
High-Visibility Clothing Beyond The Roadway
Hi-vis is not only a highway rule. Any site with forklifts, haul trucks, loaders, or backing vehicles has the same struck-by hazard. OSHA's 29 CFR 1910.132(d) requires employers to assess the workplace and select PPE that protects against identified hazards, and that assessment often lands on hi-vis for warehouses, yards, ports, rail, and utility work. ANSI/ISEA 107 Type O Class 1 garments exist for these off-road settings, where workers are not exposed to roadway traffic.
Contracts matter too. State DOTs, the U.S. Army Corps of Engineers, and many general contractors write hi-vis into their site safety requirements, often with a specific class and color. Read the spec before you buy.
Keeping High-Visibility Clothing Compliant
A hi-vis garment only works if it is still visible. Fading, dirt, torn retroreflective tape, and covering the vest with a jacket all cut performance. Replace garments that are faded, soiled beyond cleaning, or damaged, and follow the manufacturer's instructions for wash cycles. Our guide on when to replace a high-vis vest covers the warning signs.
High-Visibility Work Zone Key Statistics
- 38.2 percent of 2024 workplace deaths were transportation incidents (BLS CFOI, February 19, 2026).
- 369 worker deaths in 2024 were pedestrian incidents involving motor vehicles, up 19.0 percent from 2023 (BLS CFOI).
- 891 work zone traffic fatalities in 2022, and 94 highway worker deaths at road construction sites (FHWA, FARS data as of April 2024).
- Class 2 or 3: the minimum ANSI/ISEA 107 performance class for workers in the right-of-way under the MUTCD (FHWA MUTCD).
ANSI High-Visibility Safety Vests And Apparel
Pyramex Type R Class 2 vests. RVZ46B Series lightweight mesh | RCA27SE Series (ANSI and CSA Class 2) | RVHL50FR Series flame-resistant | RVZF61 Series women's fit
Related High-Visibility And PPE Resources
ANSI 107 explained. Types, classes, and labels.
When to replace a high-vis vest. Signs your vest is done.
OSHA PPE requirements. The employer's duty to assess and provide.
OSHA's Fatal Four. Struck-by hazards and the other leading killers.
Frequently Asked Questions About High-Visibility Clothing Requirements
Q: Does OSHA require hi-vis on every construction site?
A: Not by a single rule. OSHA requires it for flaggers and for excavation workers exposed to public traffic, and it applies the General Duty Clause to other highway work zone crews. Your hazard assessment and contract specs decide the rest.
Q: Is a Class 2 vest enough for flagging?
A: The MUTCD sets Class 2 as the minimum in the right-of-way. Many agencies require Class 3 for flaggers and night work. Check the project spec.
Q: Can workers wear a jacket over the vest?
A: Not if it covers the hi-vis material. Use hi-vis rated outerwear or wear the vest over the jacket.
Q: Who pays for hi-vis apparel?
A: When it is required PPE, the employer provides it at no cost to employees, per OSHA's payment rule in 29 CFR 1910.132(h) and the matching construction requirement.
Get The Right High-Visibility Apparel For Your Crew
BDG Safety helps safety managers and contracting officers match hi-vis apparel to the job, the spec, and the season. Call (619) 992-7621 or email info@bulldoggroup.net. BDG Safety is a Navy-veteran-founded, certified Service-Disabled Veteran-Owned Small Business (SDVOSB) that supplies Type II safety helmets and PPE to contractors, agencies, and the U.S. Army Corps of Engineers. Real people who know the gear, no phone menus. Open a B2B account or see how to buy.
Explore more guides in the BDG Safety Resource Center.