What Is an AGV? Automated Guided Vehicles Explained

Automated Guided Vehicles (AGVs) are driverless material-handling vehicles that follow fixed, predefined paths to move goods around a facility. They are among the oldest forms of warehouse robotics still in wide use today, valued for their predictability and reliability in structured environments.

Unlike newer mobile robots, AGVs rely on physical or fixed digital guidance infrastructure rather than dynamic environmental mapping. Common navigation methods include:

• Wire-guided — a wire embedded in the floor emits a signal the vehicle follows.
• Magnetic tape or spots — tape strips or magnetic markers on the floor define the route.
• Laser target navigation — reflective targets mounted on walls or racking allow the AGV to triangulate its position along a predefined path.
• Optical/color line following — a painted or taped line on the floor is tracked by an onboard camera or sensor.

Because the path is fixed, changing a route typically requires physical rework — repositioning tape, wire, or targets — which makes AGVs less flexible than camera- and LiDAR-based mobile robots, but also more predictable and easier to certify for safety in fixed, high-traffic corridors.

AGVs excel in repetitive, high-volume, point-to-point transport tasks where the layout rarely changes:

• Moving pallets between receiving docks and bulk storage
• Towing carts of totes between production lines and packing stations
• Transporting raw materials to and from manufacturing cells
• Long, straight-line transport in large distribution centers

AGVs offer strong predictability: their behavior in a corridor is well understood, which simplifies safety certification and integration with other fixed equipment such as automatic doors or conveyor interfaces. They are generally cost-effective for simple, high-repetition routes.

Their main limitation is inflexibility. Any layout change — a new production line, a reconfigured aisle, a seasonal storage expansion — requires physical infrastructure changes. This makes AGVs a poor fit for warehouses that frequently reorganize, and a strong fit for stable, high-throughput manufacturing or distribution flows.

Many facilities combine AGVs for stable, high-volume trunk routes with more flexible AMRs for variable, last-meter tasks. Understanding this distinction — covered in depth in a companion article on AGV vs AMR differences — is essential before committing capital to either technology.