Common Hazards for Road Construction Workers (and the PPE That Prevents Them)

Vehicle strikes, equipment backovers, falls, electrical contact, silica dust, asphalt burns, heat, and noise are major hazards for road construction workers. Protecting crews requires traffic control systems, engineering controls, safe work procedures, and task-specific personal protective equipment (PPE).

According to the National Institute for Occupational Safety and Health (NIOSH), 650 of 1,462 occupational fatalities at road construction sites between 2011 and 2022 involved workers struck by vehicles.

High-visibility clothing helps drivers and equipment operators recognize workers, but it cannot physically stop a vehicle. Effective road construction safety starts with preventing exposure to hazards.

Road Construction Hazards by the Numbers

The Bureau of Labor Statistics (BLS) tracks fatal occupational injuries through the Census of Fatal Occupational Injuries.

Recent data highlight the importance of traffic separation and equipment safety.

The figures represent different populations and periods and should not be combined into one fatality rate.

For crews exposed to moving traffic, properly classified Safety Vests are an important part of the required protective clothing.

However, visibility must work alongside approved traffic control arrangements, physical separation, and worker training.

Road Construction Hazards, Controls, and PPE

The following table connects common hazards with preventive controls and relevant protective equipment.

PPE requirements depend on the employer's hazard assessment and applicable OSHA standards.

1. Struck-By Hazards From Passing Traffic

Passing vehicles can enter work zones when drivers are distracted, impaired, or fail to follow traffic control instructions.

Flaggers, surveyors, utility workers, and paving crews may work within limited distances of active traffic.

The Manual on Uniform Traffic Control Devices (MUTCD) establishes requirements for temporary traffic control.

Protective measures include properly designed channelization, advance warning signs, buffer spaces, positive protection where warranted, and planned escape routes.

What PPE Do Road Workers Need?

The current federal MUTCD requires appropriate Class 2 or Class 3 high-visibility safety apparel for workers in applicable temporary traffic control zones.

The standard identifies fluorescent background materials and retroreflective markings that improve recognition.

Class 3 apparel provides additional coverage and is recommended by the MUTCD for nighttime flaggers.

Visibility reduces recognition problems but does not eliminate struck-by risk.

2. Equipment Backovers and Runovers

Dump trucks, asphalt rollers, loaders, and paving machines create struck-by hazards within construction work areas.

Operators may have limited visibility behind equipment or around large loads.

An internal traffic control plan can separate pedestrian routes from vehicle travel paths and establish designated equipment movement areas.

Backup alarms, cameras, communication procedures, and trained spotters may provide additional protection.

High-visibility apparel helps identify workers, but it must not replace equipment separation or safe reversing procedures.

3. Falls From Heights and Uneven Surfaces

Road construction workers may encounter falls around bridge decks, excavations, elevated platforms, and temporary access structures.

OSHA's construction fall protection rules appear in 29 CFR 1926 Subpart M.

Controls include guardrails, secured covers, appropriate access equipment, and personal fall-arrest systems where required.

A hard hat protects against certain head impacts but does not prevent a fall.

Workers should also maintain clear walking surfaces and use designated equipment access points.

4. Electrical Hazards and Underground Utilities

Overhead power lines create hazards for raised truck beds, crane booms, and other construction equipment.

Excavation can also expose buried electrical cables and utility infrastructure.

Before digging, crews should follow applicable utility location procedures, including contacting the appropriate 811 notification service.

Electrical safety measures may include minimum approach distances, de-energization, and qualified personnel.

Where the hazard assessment requires it, electrical protective equipment may include properly rated gloves, arc-rated clothing, and Class E hard hats.

A Class E hard hat does not provide complete protection from electrical contact.

5. Silica Dust and Diesel Exhaust

Concrete cutting, pavement milling, drilling, and grinding can generate respirable crystalline silica.

Long-term exposure can cause serious lung disease, including silicosis.

OSHA standard 29 CFR 1926.1153 establishes construction silica exposure requirements.

Table 1 identifies specified dust controls, including water delivery and commercially available dust collection systems for particular tasks.

Respirators are required in situations defined by the standard and exposure conditions.

Diesel exhaust and carbon monoxide can also accumulate around operating engines, particularly in enclosed or poorly ventilated areas.

Use appropriate ventilation, equipment maintenance, and exposure assessment.

6. Asphalt Fumes, Burns, and Hot Materials

Asphalt paving exposes workers to hot mix, heated equipment, fumes, and moving machinery.

Hot asphalt can cause severe contact burns.

Appropriate protective equipment may include heat-resistant gloves, long sleeves, safety footwear, and eye or face protection selected for the task.

Engineering controls, including suitable paver ventilation and work practices, help reduce fume exposure.

Workers should avoid unnecessary contact with hot surfaces and follow safe material-handling procedures.

7. Heat Stress During Road Construction

Road crews often work under direct sunlight near hot pavement, running engines, and asphalt equipment.

Heat illness can occur when environmental conditions, physical workload, and clothing interfere with normal heat regulation.

An effective prevention program considers hydration, rest breaks, shade, acclimatization, and monitoring for symptoms.

Breathable mesh or hybrid high-visibility apparel may improve comfort, but clothing alone cannot prevent heat illness.

Workers showing signs of heat stroke require emergency medical attention.

8. Noise and Vibration Exposure

Pavement breakers, compactors, saws, and heavy vehicles can generate hazardous noise.

OSHA construction standards 29 CFR 1926.52 and 1926.101 address occupational noise exposure and hearing protection.

Employers should assess exposure and use appropriate engineering controls.

Earplugs and earmuffs may be necessary when required by the exposure assessment.

Workers must also be able to communicate important warnings while wearing hearing protection.

Hand-arm vibration from power tools requires separate evaluation, equipment maintenance, and exposure controls.

9. Nighttime Work, Glare, and Bad Weather

Nighttime construction reduces natural visibility and can increase problems associated with glare and shadows.

Work-zone lighting should illuminate tasks without creating avoidable glare for approaching drivers.

Class 3 high-visibility apparel may be selected for nighttime operations and is recommended for nighttime flaggers.

Rain jackets or winter clothing must not conceal required high-visibility materials.

Use appropriately classified outerwear when ordinary jackets would cover the vest.

10. Trenching and Excavation Hazards

Excavation work introduces cave-in hazards in addition to nearby roadway traffic.

OSHA's 29 CFR 1926 Subpart P establishes excavation safety requirements.

Depending on soil and site conditions, workers may require sloping, shoring, or trench shields.

Protective helmets and high-visibility clothing do not substitute for an adequate cave-in protective system.

Why PPE Alone Cannot Protect a Road Crew

Road construction safety follows the hierarchy of controls.

Eliminating an exposure or separating workers from traffic provides more direct protection than relying on clothing alone.

Engineering controls include crash-tested barriers where warranted, machine guarding, dust suppression, and ventilation.

Administrative controls include traffic plans, safe work procedures, training, communication, and equipment movement restrictions.

PPE provides additional protection against remaining hazards.

For example, a high-visibility vest improves worker conspicuity, while a properly designed vehicle barrier can provide physical separation.

Both may be important, but they perform different functions.

Essential Road Construction PPE Checklist

A task-specific PPE kit may include:

• ANSI-classified high-visibility vest or outerwear.

• Head protection meeting applicable ANSI/ISEA Z89.1 requirements.

• Safety glasses meeting applicable ANSI/ISEA Z87.1 requirements.

• Appropriate protective gloves.

• Protective footwear suited to impact, compression, and puncture hazards.

• Hearing protection when required.

• Respiratory protection for qualifying airborne exposures.

• Fall protection equipment when required.

• Additional arc-rated, heat-resistant, or weather-protective clothing for specific tasks.

At the crew level, protective equipment must be supported by traffic control devices, first-aid supplies, communication equipment, and heat-illness prevention arrangements.

How Can Employers Improve PPE Use?

PPE programs work best when equipment matches the employee's actual tasks.

A flagger may prioritize reflective coverage and visibility, while a surveyor needs accessible storage and a warehouse worker may need breakaway construction.

Poor fit, excessive heat, damaged materials, and incompatible equipment can interfere with proper use.

Employers should inspect PPE, provide suitable sizes, train workers, and replace damaged garments.

For role-based recommendations, see Best Safety Vests for Road Crews, Surveyors & Warehouse Workers.

Frequently Asked Questions

What is the biggest hazard for road construction workers?

Vehicle strikes are a leading fatal hazard at road construction sites. Both passing traffic and construction equipment create exposure.

What PPE is required in a road work zone?

Requirements vary by task and exposure. Applicable workers need high-visibility apparel, plus additional head, eye, foot, hearing, respiratory, or fall protection when required.

Can a safety vest prevent someone from being struck by a vehicle?

No. High-visibility apparel improves recognition but does not physically protect against vehicle impact.

Do road construction workers need respirators?

Respirators are required when applicable exposure standards or task-specific control methods require them. OSHA's silica standard identifies respiratory protection requirements for certain construction operations.

What PPE is appropriate for asphalt paving?

Paving crews may need high-visibility clothing, heat-resistant gloves, protective footwear, and eye or face protection. The hazard assessment determines the exact equipment.

How can flaggers reduce struck-by risk?

Flaggers should follow the approved traffic control plan, maintain awareness of approaching traffic, use designated positions and escape routes, and wear required high-visibility apparel.

Conclusion

Vehicle traffic and moving equipment present some of the most serious risks to road construction workers, alongside falls, dust, electrical hazards, heat, and noise.

Effective protection begins with preventing hazardous exposure, followed by safe work procedures and properly selected PPE. High-visibility clothing remains essential where required, but it must be part of a complete work-zone safety program.