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NMI Fence
ProBarrier Arrestor anti-ram vehicle barrier installed on a sloped entranceway

Anti-Ram Vehicle Barriers & Road Blockers

ASTM-F2656 Crash-Rated

Crash-tested barriers that stop a hostile vehicle at the line. NMI Fence supplies the complete ProBarrier range — Arrestor, Enforcer, and Enforcer XLT — for high-security perimeters.

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ASTM-F2656 Crash TestedM30 & M50 RatedPlace & Pour InstallCustom Color, Text & LogoPortable & Fixed OptionsASTM-F2656 Crash TestedM30 & M50 RatedPlace & Pour InstallCustom Color, Text & LogoPortable & Fixed OptionsASTM-F2656 Crash TestedM30 & M50 RatedPlace & Pour InstallCustom Color, Text & LogoPortable & Fixed OptionsASTM-F2656 Crash TestedM30 & M50 RatedPlace & Pour InstallCustom Color, Text & LogoPortable & Fixed Options

Stop Hostile Vehicles at the Perimeter

When the threat is a vehicle, standard fencing and bollards are not enough. Anti-ram vehicle barriers are crash-tested to ASTM-F2656 to stop a moving vehicle dead at the line.

NMI Fence supplies the full ProBarrier range. Their place-and-pour design keeps installation fast, and each barrier can be customized with color, text, or a logo. Pair them with high-security anti-climb fencing for a complete perimeter security system.

ProBarrier anti-ram vehicle barriers installed along a secured perimeter
Crash Ratings

Tested to ASTM-F2656

Vehicle barriers are rated by the weight and speed they stop. ProBarrier systems are crash-tested to the recognized US standard.

Crash-Test Standard

ASTM-F2656

Impact Ratings

M30 / M50

Legacy K-Ratings

K4 / K8 / K12

Installation

Place & Pour

Barrier Models

Arrestor, Enforcer & Enforcer XLT

Three crash-rated models for every access point and threat level.

  • ProBarrier Arrestor anti-ram vehicle barrier

    Arrestor

    Anti-ram barrier engineered for sloped and uneven entranceways where standard barriers will not sit flush. Crash-tested for high-threat access points.

  • ProBarrier Enforcer anti-ram vehicle barrier

    Enforcer

    The core ProBarrier vehicle barrier. Dependable hostile-vehicle mitigation for controlled entries, checkpoints, and perimeters.

  • ProBarrier Enforcer XLT anti-ram vehicle barrier

    Enforcer XLT

    The extended, higher-capacity Enforcer built for the widest lanes and the most demanding perimeter protection requirements.

Request a Quote

Get Anti-Ram Barrier Pricing

Tell us about your site and threat level. We will get back to you within one business day with wholesale pricing.

Built For

Where Anti-Ram Barriers Are Specified

Hostile vehicle mitigation for the highest-value perimeters.

  • Government & Military

    Federal buildings, bases, courthouses, and embassies.

  • Stadiums & Event Venues

    Arenas, stadiums, and large public gatherings.

  • Critical Infrastructure

    Data centers, power plants, utilities, and water treatment.

  • Airports & Transportation

    Terminals, ports, and secure transportation hubs.

  • Corporate & Campus

    Headquarters, corporate campuses, and universities.

  • Correctional & Sally Ports

    Secure vehicular passages and detention entries.

Place & Pour

Simplified Install, Custom-Built Protection

ProBarrier's place-and-pour design speeds installation versus deep-foundation systems, and third-party installation can be coordinated through NMI.

Every barrier can be finished with custom color, text, or a logo to match the site.

Finished ProBarrier anti-ram barrier installation at a secure entry
FAQ

Anti-Ram Barrier Questions

Common questions about road blockers, crash ratings, and hostile vehicle mitigation.

What is a road blocker?
A road blocker is an active anti-ram vehicle barrier that deploys to physically stop a vehicle at an access point. Crash-rated road blockers are used where vehicles must be screened or stopped, such as government entries and secure facilities.
Road blocker vs bollard: what is the difference?
A bollard is typically a fixed post, while a road blocker is a wider active barrier that controls a full lane of vehicle traffic. Both can be crash-rated, but road blockers and wedge barriers are built to stop a moving vehicle across an entire driveway.
What is hostile vehicle mitigation (HVM)?
Hostile vehicle mitigation is the use of crash-rated barriers to stop a vehicle being used as a ram or weapon. ASTM-F2656-rated anti-ram barriers are the standard equipment for HVM at high-value sites.
What does ASTM-F2656 (M30, M50, K12) mean?
ASTM-F2656 is the US crash-test standard for vehicle barriers. M ratings (and the older K ratings) describe the vehicle weight and speed a barrier stops. For example, M50 means it stopped a 15,000 lb vehicle at 50 mph. Higher ratings mean more protection.
How much does an anti-ram vehicle barrier cost?
Cost depends on the model, crash rating, and whether the barrier is fixed or portable. NMI Fence supplies the complete ProBarrier system at wholesale pricing for your installer. Request a quote with your site details for a firm number.
Perimeter Security

Spec the Right Anti-Ram Barrier

Tell us your site and threat level and we will help you choose the right crash-rated barrier. Wholesale pricing through NMI Fence.

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