High visibility clothing, often called hi vis workwear, is an important part of workplace safety across the UK. It helps workers stand out from their surroundings so that drivers, plant operators, colleagues and other people nearby can see them more easily.
But when do workers actually need high visibility clothing? The answer depends on the risks present at the workplace. If there is a chance that a worker could be struck by a moving vehicle, plant or equipment, or needs to remain clearly visible to others, high visibility clothing may be necessary.
The Health and Safety Executive (HSE) specifically advises that high visibility clothing should be provided where workers could be run down by vehicles or need to be seen by others to work safely.
When Is High Visibility Clothing Required?
There is no single rule saying that every UK worker must wear a hi vis hoodie or jacket. Instead, employers should identify workplace hazards through a suitable risk assessment and provide appropriate personal protective equipment (PPE) where necessary.
High visibility clothing is particularly important where workers operate close to moving vehicles, machinery, traffic or other hazards where visibility can make a difference.
Common examples include:
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Road construction and maintenance workers
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Construction site workers
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Warehouse and logistics staff
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Traffic management teams
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Railway workers
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Groundworkers
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Delivery and loading staff
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Car park and traffic marshals
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Waste and recycling workers
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Utility workers
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Airport ground staff
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Emergency and roadside workers
The HSE's construction guidance states that high visibility clothing is needed where workers could be struck by vehicles, such as people involved in roadworks or vehicle manoeuvring. It can also be necessary when workers need to be clearly visible to others, such as during lifting operations.
Why Do Workers Wear Hi Vis Clothing?
The main purpose of hi vis workwear is simple: to make workers easier to see.
Bright fluorescent materials help a worker stand out during daylight, while reflective strips help return light towards its source in darker conditions. This can be particularly useful around vehicle headlights, construction machinery and other sources of artificial light.
A worker wearing a high visibility vest, jacket or other compliant garment is easier for drivers and machine operators to identify.
However, hi vis clothing is not a replacement for other safety measures. Employers should first consider ways to remove or reduce workplace risks. PPE is generally used when other controls are not enough to adequately manage the risk.
Do Construction Workers Need High Visibility Clothing?
Construction sites are one of the most common workplaces where hi vis clothing is required.
Construction workers may work around excavators, forklifts, cranes, delivery vehicles, dumpers and other moving plant. They may also work near public roads or in areas where visibility is reduced.
Depending on the site's risk assessment and site rules, workers may be required to wear hi vis vests, waistcoats, jackets, trousers or full high visibility workwear.
Visitors and contractors may also need to wear high visibility clothing when entering certain construction sites. HSE guidance notes that risk assessments should identify PPE requirements for visitors, including high visibility clothing where appropriate.
Do Road Workers Need Hi Vis Workwear?
Road workers have a particularly strong need for high visibility clothing because they may work close to moving traffic.
Road construction, road maintenance, traffic management and temporary roadworks can place workers near cars, vans, HGVs and other vehicles. Making workers more visible can help drivers and other road users recognise that people are working nearby.
For this reason, high visibility jackets, trousers and vests are widely used by road maintenance teams, traffic marshals and other workers operating in or around roads.
The type of hi vis garment required should be based on the specific working conditions, including traffic levels, visibility, weather, working hours and the risks identified by the employer.
Do Warehouse Workers Need High Visibility Clothing?
Not every warehouse worker automatically needs hi vis clothing. However, it can be appropriate where workers operate around moving vehicles or mobile plant.
For example, warehouses and distribution centres may have forklift trucks, pallet trucks, delivery vehicles and loading bays operating in the same general area as pedestrians.
A risk assessment may identify high visibility clothing as part of the required PPE for workers in these areas. Some businesses may also introduce hi vis workwear as a site-wide rule to make pedestrian workers easier to identify.
The same principle applies to loading yards, distribution centres and logistics facilities where workers and vehicles share working space.
Do Railway Workers Need High Visibility Clothing?
Railway environments can involve significant risks from moving trains and other rail vehicles. Workers involved in track inspection, maintenance, signalling and related activities need to be clearly identifiable as part of a wider safety system.
Rail safety guidance highlights the importance of controlling risks to people working on or around railway lines.
High visibility clothing can form part of the required protective equipment, alongside other controls, procedures and site-specific safety requirements.
Rail workers should always follow the PPE requirements of their employer, railway operator or project rather than relying on a generic hi vis vest.
What Hi Vis Clothing Should Workers Wear?
The right garment depends on the job and the risks involved.
Common types of hi vis workwear include:
Hi vis vests: Lightweight and suitable for workers who need visibility without substantial weather protection.
Hi vis jackets: Useful for outdoor workers who need visibility as well as protection from rain and cold conditions.
Hi vis trousers: Provide additional visibility around the lower body and can be useful for workers who need full-body high visibility protection.
Hi vis polo shirts and sweatshirts: Suitable for warmer or more comfortable working conditions where a jacket is unnecessary.
Hi vis coveralls: Offer high visibility over a larger part of the body and are commonly used for demanding work environments.
Employers should choose clothing that is suitable for the task and working conditions. HSE guidance also recommends inspecting hi vis clothing for damage and keeping it clean because poor cleanliness can reduce visibility.
What Is EN ISO 20471?
When choosing high visibility workwear in the UK, you may come across EN ISO 20471.
EN ISO 20471 is the standard covering high visibility clothing for professional use. It specifies requirements for garments designed to make the wearer conspicuous in hazardous situations.
The correct class or performance level depends on the garment and the circumstances in which it will be used. Employers should select appropriate PPE based on their risk assessment rather than simply choosing the brightest-looking garment.
UK PPE requirements also cover the safety and conformity of PPE placed on the Great Britain market. Current government guidance refers to Regulation (EU) 2016/425 as assimilated into UK law and the Personal Protective Equipment (Enforcement) Regulations 2018.
Does Hi Vis Clothing Have to Be Worn at Night?
If workers are operating in low-light conditions, darkness or areas where visibility is reduced, high visibility clothing can be particularly important.
Night workers may need garments with reflective material so they can be more easily seen when illuminated by vehicle headlights or other light sources.
However, the exact clothing requirements should be determined by the workplace risk assessment. A worker who is safe during daylight may face a different level of risk when carrying out the same job at night, particularly around roads or moving vehicles.
Who Is Responsible for Providing Hi Vis Workwear?
Where high visibility clothing is identified as necessary PPE, employers have responsibilities for providing suitable equipment. HSE guidance states that employers are responsible for providing, replacing and paying for PPE where it is required to control workplace risks.
Workers should also use PPE correctly, look after it and report damaged or unsuitable equipment.
High visibility clothing must be kept in suitable condition. Dirt, damage, worn reflective tape and heavily soiled fabric can reduce its effectiveness. HSE guidance specifically highlights cleanliness as an important factor in maintaining visibility.
Frequently Asked Questions
Is high visibility clothing legally required in the UK?
High visibility clothing is not automatically required for every occupation. It should be provided and worn where a workplace risk assessment identifies a need for it, particularly where workers could be struck by vehicles or need to be clearly seen.
Do I need a hi vis vest on a construction site?
Many construction sites require workers and visitors to wear high visibility clothing, especially where moving vehicles and machinery are present. Always follow the site's PPE requirements and risk assessment.
What colour is best for high visibility workwear?
Fluorescent colours such as yellow or orange are commonly used because they help workers stand out from their surroundings. Reflective materials provide additional visibility in low-light conditions.
Can I wear any hi vis vest at work?
Not necessarily. The garment should be suitable for the risks and conditions of the job. Where high visibility PPE is required, employers should select suitable compliant workwear rather than relying on a basic vest simply because it is brightly coloured.
How often should hi vis clothing be replaced?
There is no universal replacement period. Hi vis clothing should be inspected regularly and replaced when it becomes damaged, excessively worn, heavily soiled or no longer provides the required visibility.
Choose the Right Hi Vis Workwear for Your Team
High visibility clothing is most important wherever being seen can help prevent an accident. Whether you work on a construction site, road project, warehouse, railway, logistics yard or outdoor worksite, the right hi vis workwear can form an important part of your overall safety arrangements.
At Noroze, you can find high visibility workwear designed for UK working conditions, including practical garments for workers who need to remain visible while working indoors or outdoors.
Before choosing your workwear, consider the working environment, traffic and vehicle risks, weather, lighting conditions, required PPE standards and the findings of your workplace risk assessment. The right combination of high visibility clothing and other safety controls can help workers stay visible and work more safely.