Every autonomous mobile robot operating on a factory floor or inside a warehouse shares one non-negotiable obligation: it must be safe—for the people working around it, the infrastructure it moves through, and the goods it handles. But knowing what safe means in a regulatory context is where many operations teams, system integrators, and procurement managers get stuck.

Three standards define the compliance landscape for AMRs and AGVs across global markets: ISO 3691-4, which sets the international framework for driverless industrial trucks; ANSI/RIA R15.08, the North American standard for industrial mobile robots; and ANSI B56.5, which governs automated guided vehicles and their automated functions. Understanding how each one applies to your operation—and what you need to verify before deployment—is the foundation of responsible automation.

This guide breaks down all three standards in plain language, provides a practical compliance checklist you can actually use, and explains how the standards interact with one another so you can prioritize your compliance efforts confidently.

Why AMR Safety Compliance Matters

A common misconception in industrial automation is that AMR safety standards are purely optional guidelines with no real teeth. Technically, standards like ISO 3691-4 and ANSI R15.08 are not legally mandated in most jurisdictions the way that, for example, OSHA regulations are. In practice, however, the picture is considerably more complex. Insurers increasingly require compliance documentation before covering automated facilities. Enterprise procurement contracts routinely specify standard adherence as a vendor qualification. And in the event of a workplace incident involving a mobile robot, demonstrated non-compliance can shift legal liability dramatically.

Beyond risk management, compliance signals operational maturity. Organizations that systematically apply these standards tend to deploy AMRs with fewer incidents, shorter commissioning timelines, and better long-term uptime—because the frameworks force teams to rigorously assess hazards before they become problems on the floor. Whether you are a robot manufacturer, a system integrator, or an end-user deploying a fleet, understanding these standards is not just about passing an audit. It is about building automation that works safely from day one.

ISO 3691-4: The International Benchmark for Driverless Industrial Trucks

ISO 3691-4 (the current edition is ISO 3691-4:2023, which superseded the 2020 version) is the primary international safety standard for driverless industrial trucks and their systems. Published by the International Organization for Standardization and adopted as EN ISO 3691-4 in Europe, this standard applies to any powered truck designed to operate automatically without a driver aboard. The scope is deliberately broad: it covers AGVs, AMRs, automated guided carts, automated tuggers, and under-cart systems, making it the most universally relevant standard in the space.

The standard addresses the full lifecycle of a driverless vehicle system, from initial design and risk assessment through operational use, maintenance, and eventual decommissioning. It defines the safety requirements that manufacturers must incorporate into vehicle design and the verification activities needed to confirm those requirements are met. Critically, it also establishes requirements for the systems in which these trucks operate—not just the vehicles themselves—recognizing that a safe robot in an unsafe environment is not truly safe.

Key Areas Covered by ISO 3691-4

• Hazard identification and risk assessment: Systematic identification of hazards throughout the truck’s lifecycle, with documented risk reduction measures applied in priority order (inherently safe design first, then safeguarding, then information for use).
• Detection and stopping performance: Requirements for detecting persons in the truck’s path, including minimum detection zone dimensions and stopping distance calculations based on speed and load.
• Speed and load management: Rules governing maximum operating speeds relative to environmental conditions and stability requirements under rated loads.
• Emergency stop functions: Specifications for emergency stop devices, response times, and the safety integrity levels required for stopping functions.
• Operational modes: Requirements for automatic mode, manual mode, and maintenance mode, with clear rules on how transitions between modes must be controlled.
• Information and markings: Labeling requirements, operator instructions, and maintenance documentation standards.
• Verification and validation: Test methods to confirm that safety requirements have been met before deployment.

For manufacturers exporting robots to European markets or operating in countries that align with ISO frameworks, ISO 3691-4 compliance is effectively the price of admission. Reeman’s autonomous forklifts—including the Ironhide Autonomous Forklift and the Rhinoceros Autonomous Forklift—are designed with the detection, stopping, and risk-reduction principles that ISO 3691-4 demands.

ANSI/RIA R15.08: The North American Standard for Industrial Mobile Robots

Developed by the Robotic Industries Association (now part of the Association for Advancing Automation, A3) and published as an ANSI standard, R15.08 was created specifically to address the safety gap left by older standards. The existing R15.06 standard covered fixed industrial robots, and B56.5 addressed AGVs that follow predefined paths—but neither adequately captured the unique characteristics of modern AMRs that navigate dynamically through free space. R15.08 fills that gap.

The standard is structured in parts, each targeting a different stakeholder in the AMR deployment chain. Part 1 (R15.08-1) addresses robot manufacturers. Part 2 (R15.08-2) addresses system integrators. A forthcoming Part 3 will address end-users. This layered structure reflects the reality that AMR safety is a shared responsibility distributed across the supply chain, not something that can be delegated entirely to any single party.

R15.08 Industrial Mobile Robot Classifications

One of R15.08’s most practically useful contributions is its formal classification of industrial mobile robots into three types, which helps teams apply the right set of requirements to the right vehicle:

• IMR Type A: An autonomous mobile platform capable of moving and navigating through free space without any payload attachment beyond the platform itself.
• IMR Type B: A Type A platform plus a non-manipulator attachment, such as a shelf, bin, or conveyor module. The attachment may be passive (static shelf) or active (powered conveyor).
• IMR Type C: A mobile manipulator—an industrial robot arm mounted on a mobile platform. This is the most complex classification, with the most demanding safety requirements.

Reeman’s IronBov Latent Transport Robot and the Stackman 1200 Autonomous Forklift fall within the IMR Type A and Type B categories respectively, which informs the specific R15.08 requirements applicable to their design and deployment.

What R15.08 Part 1 Requires from Manufacturers

Part 1 places the initial burden of safety on the robot manufacturer. It requires documented hazard identification, risk assessment across all foreseeable uses and misuses, and implementation of risk reduction measures with verified effectiveness. Manufacturers must provide comprehensive information for use—including residual risk warnings, intended use definitions, and maintenance procedures—so that downstream integrators and users can complete their own safety obligations.

What R15.08 Part 2 Requires from Integrators

Part 2 picks up where Part 1 ends. System integrators are responsible for adapting and configuring the AMR system to the specific application and facility. This includes performing a site-level risk assessment, defining the operational design domain (where the robot will operate and what it will do), implementing application-specific safeguarding at workstations and charging stations, and validating that the integrated system meets the safety requirements identified in the risk assessment. Integrators must also create a technical file documenting all of these activities.

ANSI B56.5: Safety for AGVs and Automated Functions of Manned Vehicles

ANSI/ITSDF B56.5 (current edition: B56.5-2019) is the older of the three primary standards and is maintained by the Industrial Truck Standards Development Foundation. Where R15.08 was built around the new generation of free-navigating AMRs, B56.5 was developed primarily for traditional AGVs that follow predefined guide paths—wire-guided, optical-guided, or magnetic-tape-guided vehicles. It also covers the automated functions of manned industrial vehicles, such as forklifts that include automated features for specific tasks.

B56.5 remains highly relevant for several reasons. Many industrial facilities still operate traditional AGV fleets alongside newer AMRs, so compliance with both B56.5 and R15.08 may be simultaneously required. Additionally, B56.5 contains specific provisions for vehicles equipped with forks and lifting mechanisms that are directly applicable to autonomous forklift systems—content that R15.08 does not address with the same specificity.

Core Requirements in ANSI B56.5

• Vehicle construction and design: Structural integrity requirements, stability criteria, and performance specifications for guided vehicles.
• Safety devices: Requirements for bumpers, presence-sensing devices, audible and visual warnings, and emergency stop mechanisms.
• Guide path and operational environment: Standards for path design, clearances, intersection management, and interaction with pedestrian traffic.
• Speed and stopping: Maximum speed requirements relative to detection capability and requirements for stopping distances at intersections and pedestrian crossings.
• Maintenance and inspection: Periodic inspection intervals and pre-shift inspection requirements for operators and maintenance personnel.
• Training requirements: Competency standards for personnel who operate, maintain, or supervise AGV systems.

The Master AMR Safety Compliance Checklist

The following checklist consolidates the most critical compliance activities across all three standards. Use it as a structured audit tool during robot selection, pre-deployment planning, system integration, and periodic reviews. Items are organized by stakeholder responsibility.

For Robot Manufacturers (Primarily ISO 3691-4 and R15.08 Part 1)

• Completed and documented hazard identification covering all lifecycle phases
• Formal risk assessment with risk reduction measures ranked by hierarchy (elimination, safeguarding, information)
• Detection zones sized and validated against maximum operating speed and maximum stopping distance
• Safety-rated stopping function with documented safety integrity level (SIL or PL rating)
• Emergency stop devices installed and accessible, with verified response times
• Stability verified under rated load, maximum speed, and worst-case floor conditions
• Operating mode controls (automatic, manual, maintenance) with verified safe transitions
• Complete information for use provided: intended use, residual risks, contraindications, maintenance instructions
• Required markings affixed: rated capacity, maximum speed, warning labels
• Verification test records documenting all safety requirement validations
• IMR classification (Type A, B, or C per R15.08) declared and documented

For System Integrators (Primarily R15.08 Part 2 and ANSI B56.5)

• Site-level risk assessment completed for the specific application and facility
• Operational design domain defined: designated operating areas, no-go zones, and transition points
• Traffic management plan established: routing logic, intersection priority rules, and pedestrian crossing protocols
• Workstation integration safeguarding implemented and validated
• Charging station safety requirements verified (no inadvertent movement during charging)
• Emergency stop coverage confirmed across all operating zones
• Floor markings, barriers, and visual warnings installed per site risk assessment
• System-level testing completed under realistic operational conditions including worst-case scenarios
• Technical file compiled: risk assessment, design decisions, test records, and residual risk documentation
• Handover documentation prepared for the end-user including residual risks and operational constraints

For End-Users and Operators (Primarily R15.08 Part 3 and ANSI B56.5)

• Personnel training completed: operators, supervisors, and maintenance technicians
• Pre-shift inspection procedures established and documented
• Incident and near-miss reporting system in place
• Periodic safety audits scheduled (recommend minimum annually or after significant operational changes)
• Change management process defined: any modification to robot configuration, route, or environment triggers re-assessment
• Maintenance procedures followed per manufacturer instructions with records maintained
• Emergency response procedures posted and rehearsed with all affected personnel
• Access control measures in place to prevent unauthorized personnel from entering operating zones

How These Standards Overlap and Complement Each Other

A practical question that comes up frequently is whether complying with one standard means you have automatically satisfied another. The short answer is no—but the standards do overlap significantly, and work done for one substantially advances compliance with the others. All three share a foundation in risk assessment methodology, the hierarchy of risk reduction, and the requirement for documented verification. If your team has completed a rigorous risk assessment to ISO 3691-4 requirements, a large portion of that work applies directly to R15.08 Part 1 compliance as well.

The key distinctions are jurisdictional and stakeholder-specific. ISO 3691-4 is the relevant framework for European CE marking and international markets. R15.08 is the North American framework, with increasing adoption in other markets that follow ANSI standards. ANSI B56.5 adds specific requirements for path-following AGVs and forklift attachments that the other two standards do not fully address. For organizations deploying autonomous forklifts—such as Reeman’s Ironhide or Rhinoceros models—reviewing B56.5 alongside ISO 3691-4 provides the most comprehensive coverage of forklift-specific hazards.

How Reeman Robots Are Built for Safety Compliance

Reeman designs its autonomous mobile robots and autonomous forklifts with the safety requirements of ISO 3691-4, R15.08, and ANSI B56.5 embedded into the engineering process—not added as an afterthought. The laser navigation and SLAM mapping systems that power robots like the Big Dog Delivery Robot and the Fly Boat Delivery Robot are configured to support the detection zone and stopping performance requirements that both ISO 3691-4 and B56.5 specify. Autonomous obstacle avoidance, safety-rated emergency stop functions, and multiple operational mode controls are standard across the product lineup.

For organizations building custom AMR solutions, Reeman’s open-source SDK platform and modular robot mobile chassis options—including the Big Dog Robot Chassis, Fly Boat Robot Chassis, and Moon Knight Robot Chassis—give integrators the technical foundation needed to build compliant systems without starting from scratch on safety architecture. With over 200 patents and more than a decade of industrial robotics expertise, Reeman provides manufacturers and integrators with the documentation, design information, and technical support needed to complete their compliance obligations under all three frameworks.

Conclusion

AMR safety compliance is not a single checkbox—it is a structured, ongoing process that spans robot design, system integration, facility preparation, personnel training, and operational management. ISO 3691-4 establishes the international design and verification baseline. ANSI/RIA R15.08 defines specific obligations for manufacturers, integrators, and users in the North American context. ANSI B56.5 adds essential coverage for path-following AGVs and fork-equipped vehicles. Together, these three standards form a comprehensive framework that, when applied systematically, produces AMR deployments that are safer, more reliable, and more defensible in the event of an audit or incident.

The compliance checklist provided in this guide is a practical starting point, not a substitute for reading the full standards or engaging qualified safety professionals for complex deployments. Use it to structure your conversations with robot manufacturers, guide your integrators’ documentation requirements, and build a repeatable safety review process that grows with your automation program.