Securing an area to protect pedestrians in environments with vehicles

Bollards are upright posts installed to control or deny vehicle movement while preserving pedestrian access. In a commercial security context, they are most often used for hostile vehicle mitigation (HVM), storefront protection, perimeter control, and safe separation of people from vehicles at entrances, forecourts, loading zones, and public-facing areas.

This page explains fixed, removable, retractable, and crash-rated bollards in a way that works for both non-specialists and security practitioners.

What a bollard does (plain English)

A security bollard is a physical barrier. It is intended to:

  • Stop a vehicle (in higher-security designs)
  • Deter a vehicle (by presenting a visible barrier line)
  • Channel vehicles (to slow and guide traffic)
  • Protect people and assets where vehicles can accidentally or deliberately enter

Not all bollards are designed to stop a vehicle at speed. Many “street” or decorative bollards are primarily visual/traffic guidance. If your risk includes ramming, you typically need crash-rated bollards (tested to recognised standards).

Where bollards fit in a layered security model

Bollards are most effective when specified as part of an overall scheme that includes:

  • Risk assessment (threat, likelihood, and consequences)
  • Vehicle approach management (run-up distance, turning radii, gradients)
  • Access control (authorised vehicle entry points)
  • Surveillance and response procedures
  • Safety and accessibility (pedestrian flow, disability access, emergency egress)

From a governance standpoint, bollards are a “physical control” that can reduce reliance on human vigilance, but they also introduce operational duties (maintenance, inspections, access management).

Types of bollards

Fixed bollards (static / permanent)

Fixed bollards are permanently installed posts designed to provide continuous protection. They are common where you want a clear “no vehicle” boundary at all times, such as:

  • Building frontage
  • Pedestrian plazas
  • Data centre perimeter lines (where vehicle access is not required)

Benefits

  • Highest reliability (no moving parts)
  • Clear deterrence and boundary definition
  • Often best value when continuous denial is needed

Considerations

  • May complicate deliveries, waste collection, emergency access if not planned
  • Foundations, underground services, and drainage can be significant cost drivers

Removable bollards

Removable bollards are normally locked in place but can be removed to allow occasional authorised vehicle access (e.g., emergency access, periodic deliveries, event logistics).

Benefits

  • Flexibility without motors/hydraulics
  • Lower complexity than automated systems

Considerations

  • Operational dependency: keys, procedures, and staff availability
  • Removal/storage processes must be safe and auditable
  • Risk of “left out” situations during busy operations

(Industry examples frequently group static systems into “fixed or removable security” options in commercial HVM ranges; see vendor descriptions such as Avon Barrier – Bollards.)

Retractable bollards (active / rising)

“Retractable” generally means the bollard can lower into the ground and rise again to control vehicle entry. These are often called automatic bollards or rising bollards. They are used where the site needs:

  • Normal-day vehicle control (authorised entry)
  • Strong protection when raised

Benefits

  • Balances security with day-to-day access requirements
  • Can integrate with access control (RFID, intercom, ANPR, guards)

Considerations

  • Moving parts, power, and controls increase failure modes
  • Requires maintenance regime and contingency planning (manual override, fail-safe behaviour, backup power where needed)
  • Civil works can be substantial (pit, drainage, sub-base, service relocations)

As an example of how retractable solutions are positioned, manufacturers describe automated bollards as hydraulic or electromechanical systems that retract to road level to allow authorised access, and note testing to recognised standards for HVM product lines (example: Avon Barrier – Crash Tested HVM Products).

Crash-rated bollards (what “crash-rated” really means)

Crash-rated bollards have been impact tested against defined vehicle types at defined speeds, with measured penetration beyond the bollard line.

Key point for both executives and specialists: “Crash-rated” is only meaningful when you know the test standard and the rating code.

Common test standards referenced internationally include:

  • ASTM F2656 (widely used in the US for higher-speed perimeter barriers)
  • PAS 68 (UK specification historically used for vehicle security barrier testing)
  • IWA 14-1 (international workshop agreement used globally for rating vehicle security barriers)

Commercial security suppliers often cite these standards as the basis for “impact tested” or “crash tested” product claims (example: Avon Barrier – Bollards mentions PAS 68, IWA 14-1 and ASTM F2656 for high security bollards).

Understanding an ASTM F2656-style rating (specialist-friendly)

ASTM F2656 classifies performance by:

  • Vehicle category/weight and test speed (e.g., the common “M” truck classifications such as M30/M40/M50)
  • Penetration distance past the barrier line (often expressed as P1–P4 in industry summaries)

A practical explanation of penetration classes and speed categories is provided in industry guidance that summarises ASTM F2656’s approach (example explanation: TiSO – Guide to ASTM F2656 standard).

Why crash rating is not enough on its own

Even with a strong rating, real-world performance depends on:

  • Foundation design matched to the tested configuration
  • Soil conditions and underground service constraints
  • Spacing and line continuity (vehicle “path of least resistance”)
  • Approach geometry (can vehicles build speed? can they mount kerbs?)
  • Adjacent weak points (glazing, doors, side routes, street furniture)

For security specialists, this is where bollards sit within protective design and HVM planning: the rated bollard is one element; the site layout determines whether the rating is meaningful in practice.

Choosing between fixed, removable, retractable (decision guide)

Choose fixed when:

  • You want continuous denial with minimal operational overhead
  • Vehicle access is not required across that line
  • You want the lowest mechanical complexity and strong reliability

Choose removable when:

  • Access is needed occasionally (planned, controlled)
  • You can enforce key control and documented procedures
  • You want to avoid powered systems

Choose retractable when:

  • Access is frequent and must be managed smoothly
  • You need security “up” and convenience “down”
  • You have the budget and discipline for maintenance and fault handling

Choose crash-rated (in any of the above forms) when:

  • Your threat model includes deliberate ramming
  • The consequences justify engineered vehicle stopping capability
  • You have a requirement to align with recognised test standards (often seen in higher-risk commercial and public realm projects)

Manufacturers explicitly offer crash-tested variants across static and active types (e.g., “static & active” HVM solutions tested to PAS 68 / IWA 14-1 / ASTM F2656 are described at Avon Barrier – Crash Tested HVM Products).

Commercial design and operational considerations (often missed)

Safety, accessibility, and user experience

  • Maintain safe pedestrian flow and consider disability access needs around bollard lines
  • Avoid creating pinch points at peak times (venues, office towers, retail)
  • Use lighting and visual contrast to reduce trips/collisions at night

Business continuity and maintenance

Retractable systems need:

  • Preventive maintenance schedule (mechanical + electrical)
  • Spares and service response SLAs
  • Manual override procedures and staff training
  • Consideration of “fail up” vs “fail down” behaviour depending on safety and operational requirements

Legal / liability and governance

  • If bollards are specified as “crash-rated,” document the standard and rating; avoid vague language
  • Maintain installation records, commissioning tests, and inspection logs
  • Ensure operating procedures align with WHS requirements (manual handling for removable units, exclusion zones during operation for rising bollards)

Cost drivers (balanced financial view)

Costs typically cluster into:

  • Civil works (excavation, foundations, drainage, service relocations)
  • Hardware (bollards + controls)
  • Integration (access control, safety loops, interlocks)
  • Ongoing maintenance and lifecycle replacement

In many commercial sites, civil works and service relocations can exceed the bollard unit cost, particularly for retractable systems.

Summary

  • Fixed bollards: simplest and most reliable for permanent vehicle denial.
  • Removable bollards: flexible, lower complexity, higher procedural dependency.
  • Retractable bollards: best for controlled access, higher lifecycle and operational considerations.
  • Crash-rated bollards: validated stopping performance, only meaningful when tied to a recognised standard and an explicit rating.

References (independently checkable)