A very narrow aisle is a corridor with no escape route. A pedestrian who meets a turret truck between two racks has nowhere to step, and the usual advice about awareness and eye contact stops being useful. That specific geometry is what ALIS Tech, a Czech manufacturer, has built its system around, and it approaches the problem more like traffic engineering than like sensing.
Detection, then control
The foundation is a UWB tag exchange between forklifts, pedestrians and fixed infrastructure. What the company does with that signal is where it separates from the field.
Autonomous deceleration slows trucks entering defined zones, with two-phase deceleration in predefined scenarios and separate indoor and outdoor speed limits. Narrow aisle traffic control manages which vehicles are in an aisle and slows those approaching one, with optoacoustic indication of a truck already working inside. Gate control is the unusual one: a wireless system for industrial doors where the truck is slowed or held depending on how far the door has actually opened. Pedestrian tags vibrate when a forklift is close.
Then there is the LED floor marking, triggered by forklift or pedestrian movement rather than lit permanently. Painted lines and static lights lose meaning through familiarity; a line that illuminates only when something is coming keeps its information value. It also puts the warning where a walking person is already looking, which is at the floor.
The company also handles crane safety lighting and a broader logistics floor marking range, and describes the system as a tailored deployment rather than an off-the-shelf kit.
Where it fits
Very narrow aisle operations, high-bay warehouses and any site where the dangerous interactions cluster at chokepoints: aisle entries, doorways, intersections between traffic routes. If your incidents and near misses map onto a handful of fixed places rather than the whole floor, an infrastructure-led system addresses the real pattern. Our guide to narrow aisle safety explains why those aisles behave differently from open floor.
It also fits sites already committed to zone speed policy, since deceleration and traffic control are the point rather than an add-on.
Where it does not
This is infrastructure. Floor marking, gate integration and aisle control mean installation work, cabling or mounting in the building, and a longer deployment than bolting a camera to a mast. A leased warehouse with two years left on the term is a poor candidate.
It is also tag-based at the pedestrian layer, with the usual consequence for visitors. And as a smaller European vendor, the practical question in North America is support: ask directly who installs and services the system near your site.
One note on framing. The company’s page carries several of the widely circulated industry figures, including the familiar claims about annual serious injuries and the share of accidents that are preventable. These numbers travel between vendor sites without a clear primary source. They are not a reason to discount the product, but keep them out of your business case; our forklift accident statistics guide works from what employers actually reported.
Six alternatives worth quoting
ELOKON is the nearest technical comparison, with UWB detection, programmable zone shapes and automatic speed reduction, plus a stationary unit for fixed hazards. See our ELOshield review.
Speedshield gets to zone speed differently, combining a speed limiter with a sensor that reads the distance to the ceiling to detect indoor and outdoor transitions, which avoids floor infrastructure entirely where your policy follows the building line.
HIT-NOT is the alternative if the aisle problem is really a visibility problem, since magnetic fields pass through the racking that defines the aisle.
Blaxtair covers untagged people, so consider it as the second layer over any tag-based aisle system.
Claitec offers a comparable European range including pedestrian alerts and access control, and is worth quoting for price discovery on the continent.
Your racking supplier, unglamorously. Some narrow aisle risk is best solved with physical separation, a one-way system or a redesigned pick face, none of which carry a subscription. Look at forklift safety barriers before assuming the fix is electronic.
What to verify
Ask what the LED marking needs from your floor and how it survives a scrubber. Ask how gate control integrates with the door hardware you already own. Ask for the deployment timeline in weeks, including the infrastructure work, and confirm the local service arrangement in writing.
The risk scorer will show whether your exposure really is concentrated at chokepoints, which is the question that decides whether this architecture is right for you.
