The HVM Bollards Buyer's Guide

What Actually Counts as an HVM Bollard

Not every bollard on a street is a security bollard. Traffic bollards, decorative bollards and parking-restriction posts are designed to be visible and mildly obstructive, so they'll stop a car nudging a kerb, not a truck driven deliberately at speed.

A HVM bollard, by contrast, is engineered and independently crash-tested to arrest a specific vehicle, at a specific speed, and to keep penetration beyond the line of the bollard within a defined distance. That distinction matters enormously for anyone specifying protection for a pedestrianised high street, a stadium concourse, a government building or a transport hub, because the two product categories are sometimes marketed using very similar language.

Anatomy of a Crash-Rated Bollard: What's Actually Inside

A tested bollard is a system, not a single component, and every part of that system is load-bearing in the engineering sense.

The steel core. Most crash-rated bollards use a circular or square hollow steel section, typically grade S355, chosen for its yield strength and ductility. Wall thickness is one of the biggest variables between a decorative-grade post and a HVM product; a tested bollard's core is often noticeably thicker-walled than anything sold purely for traffic management. In practice, the market spans a fairly wide diameter range, you'll see products from around 150mm right up past 300mm, with the smaller, slimmer profiles generally paired with lighter vehicle-class ratings and the larger sections reserved for the higher-speed, heavier-vehicle end of the range.

The foundation and root. The steel core is set into a reinforced concrete foundation, sometimes with a root below ground that transfers impact load into the surrounding soil or slab rather than concentrating it at ground level. Foundation depth, reinforcement cage design and concrete grade are all specified as part of the tested system.

Material and finish choice. All HVM bollards are built around a structural steel core; what varies is the visible finish or the sleeve fitted over that core. Stainless steel sleeves are commonly used where corrosion resistance and a premium appearance matter, while powder-coated or galvanised finishes offer a more budget-conscious alternative. Bollard sleeves are also available in a range of other materials, including polyurethane, polymer and other architectural finishes, allowing a scheme to achieve the required look without changing the tested steel structure beneath. In practice, dedicated bollard sleeves are sold as their own product category so streetscapes can standardise on one finish without every bollard needing to be identical underneath.

Above-ground height and spacing. Height is more variable than a lot of buyers assume. Sub-1000mm options exist for locations where sightlines or streetscape proportions matter, 1000mm is the most common default, and taller-than-1000mm variants are specified where a more assertive visual deterrent is wanted. Centres of roughly 1.2m–1.5m are typical to prevent a vehicle passing between posts while still allowing pedestrian, wheelchair and pushchair movement.

From PAS 68 to ISO 22343: How Bollards Are Tested and Rated

For most of the last two decades, PAS 68 was the standard specifiers reached for by default, and it's still the term that gets typed into search bars. A PAS 68 bollards guide is effectively what most people mean when they ask about crash-rated street furniture. It's worth understanding both the legacy standard and where the industry has actually moved, because the two live alongside each other in current product ranges: it's common to see the bulk of a supplier's catalogue still certified to PAS 68.

PAS 68, published by the British Standards Institution, tested vehicle barriers against a defined vehicle mass, approach speed and impact angle, and measured penetration from the rear (protected side) of the barrier.

In September 2023, both PAS 68 and IWA 14 were formally withdrawn and replaced by ISO 22343, split into two parts: ISO 22343-1 covers the impact performance requirements and test method, while ISO 22343-2 covers selection, application and site-specific use. ISO 22343-1 requires a defined minimum soil bearing capacity for the test foundation, standardises debris dispersion recording, and, critically for the UK market, from March 2024 the National Protective Security Authority (NPSA) will only accept new listings in its Catalogue of Security Equipment for products tested to ISO 22343-1. Products tested under the old PAS 68 or IWA 14 regimes before that cutoff remain listed and remain valid for specification, but any newly certified product will carry an ISO 22343 rating, not a PAS 68 one.

Decoding the Rating: What the Classification Code Actually Means

A PAS 68 crash tested code is structured as: Classification of Test / Gross Vehicle Weight (kg) (Vehicle Class) / Impact Speed / Angle of Impact : Penetration / Debris Dispersion. So a code like V/7500(N3)/80/90:7.5/20.0 tells you a 7,500kg vehicle (an N3-class truck, the "V" designation) struck the barrier at 80km/h at a 90-degree angle, penetrated 7.5 metres beyond the barrier line, and scattered significant debris up to 20 metres away. ISO 22343-1 uses a broadly similar logic but measures penetration from the vehicle's attack face and applies a wider set of test vehicle classes and speeds, so a rating under the new standard isn't a straight numerical swap for an old PAS 68 figure, and this is exactly the trap the "avoid cross-referencing old and new ratings" advice in the industry exists to prevent.

Three things matter most when you're actually reading a spec sheet:

• Vehicle mass and class: You'll typically see product ranges structured around N1 (light vehicles/cars), N2 (medium goods vehicles) and N3 (heavy trucks) classes. Does the rating match the realistic threat vehicle for your site? A rating tested against a passenger car tells you nothing useful if your risk assessment identifies a loaded HGV as the credible threat.
• Impact speed: Product ranges are usually banded into distinct speed tiers, commonly around 30mph, 40mph and 50mph, each pairing a heavier vehicle class with a higher speed as you move up the range. This should be informed by a vehicle dynamics assessment of the approach, not picked in isolation. A bollard rated for a 30mph impact protecting a straight run of road where a vehicle could realistically reach 50mph is under-specified regardless of how solid it looks.
• Penetration distance: This defines how much standoff you need between the bollard line and whatever it's protecting. A lower penetration figure lets you site the barrier closer to the building or crowd space it's defending, which matters enormously on constrained urban sites.

Foundation Types: Deep Mount, Shallow Mount and Root Systems

A traditional deep-mount, root-fixed system (often simply called "standard mount" in product ranges) relies on a large reinforced concrete foundation extending well below ground, with the bollard's steel core cast directly into it. This tends to deliver the strongest, most predictable performance because the foundation has enormous mass and embedment to resist rotation and pull-out. The trade-off is excavation depth, which becomes a serious problem wherever utilities, infrastructure, basements or existing services sit close to the surface, a common headache on historic town centres and dense urban schemes. It's also, unsurprisingly, the fixing type most heavily represented in most manufacturers' ranges, simply because it's the default choice wherever ground conditions allow it.

Shallow-mount and ultra-shallow-mount bollards have become one of the more interesting areas of product development in this sector precisely because of that constraint, and it's now common to see both a standard shallow-mount version and a further ultra-shallow variant sitting alongside each other at the same speed and vehicle-class rating within a single range. These use wider, flatter foundation designs that spread impact load laterally across a broader concrete footprint instead of relying on deep embedment. Some incorporate an integral rebar cage built into the unit itself to simplify what would otherwise be a more complex reinforcement detail on site. They allow crash-rated protection to be installed above buried services, on structural decks, over existing pavement builds, or on bridges and car park roofs where deep excavation simply isn't an option.

Installation: Groundworks, Services and Standoff Distance

Ground investigation comes first, not last. ISO 22343-1 test foundations assume a defined minimum soil bearing capacity. If your actual site has poor ground, made-up fill, or a shallow water table, the as-tested performance simply doesn't transfer without either ground improvement or a documented engineering assessment of the modification. This is one of the most common gaps between a spec sheet and a working installation.

Service diversions need to happen early. Deep-mount foundations routinely clash with gas, water, telecoms and drainage runs in urban streets. A shallow-mount specification is sometimes chosen specifically to avoid this.

Standoff distance is a design output, not an afterthought. The whole point of knowing a bollard's penetration distance is to work out how far back from the protected asset the bollard line needs to sit. This is usually informed by a hostile vehicle mitigation risk assessment that considers achievable approach speeds.

Swept path and pedestrian access can't be an afterthought either. Spacing bollards to stop vehicles while still allowing wheelchairs, pushchairs, cyclists and emergency vehicles through is a design tension, and it's usually resolved with a mix of fixed bollard runs and a controlled access point using a removable, retractable or rising bollard.

How Bollards Actually Stop a Vehicle

A crash-rated bollard is designed to absorb and redirect kinetic energy in a controlled way: the steel core deforms plastically, the foundation transfers load into the surrounding ground or slab, and the vehicle's chassis is arrested or deflected. This is why penetration distance is reported rather than a simple pass/fail. Every tested impact involves some post-impact movement of the vehicle and some deformation of the barrier, and the standard exists to quantify exactly how much.

This also explains why debris dispersion is recorded. A vehicle that strikes a barrier at speed can shed a wheel, bumper or engine component that continues travelling independently.

Choosing the Right Bollard Operating Type

Fixed bollards are the default for a permanent line of protection, but plenty of sites need vehicle access some of the time such as for deliveries, emergency access, and market days. The operating type is as much a specification decision as the crash rating itself, and it's genuinely reflected in how narrow most ranges get as you move up the access-flexibility scale: root-fixed static units are usually the largest category by some margin, removable options a smaller but still meaningful slice, and retractable products the rarest and most specialised.

• Static, root-fixed bollards are the simplest, cheapest and most robust option wherever permanent closure is acceptable.
• Removable bollards unlock and lift out manually, useful for infrequent, planned access where an operative is available.
• Retractable and rising bollards drop below ground level via hydraulic, electromechanical or manual mechanisms, giving controlled vehicle access without removing the unit entirely.
• Automatic and traffic-light-integrated systems add access control logic on top of the mechanical bollard, typically for higher-security or higher-traffic sites where manual operation isn't practical.

Specifying and Procuring: What to Ask Before You Buy

• What standard was the product actually tested to?  
• Does the tested configuration match your actual foundation depth, ground conditions and spacing, or would your site require an engineered modification assessment?
• Is the vehicle class, mass and speed in the rating a genuine match for the threat identified in your site's risk assessment, rather than the highest number available?
• What penetration distance does the rating deliver, and does your available standoff distance actually accommodate it?
• What's the maintenance obligation, particularly for any moving parts, and who's responsible for post-impact assessment and reinstatement?
• How does the finish integrate with the wider streetscape or building context, and has that been considered alongside the security performance?

None of these questions have a universally right answer as they depend entirely on the site, the threat assessment and the constraints of the ground you're building on. But asking them at the specification stage, rather than discovering the gaps during installation, is what turns a crash-rated bollard from a compliance box-tick into protection that actually does what its certificate says it does.