Inside road tunnel looking at jet fans on ceiling
Infrastructure NXTGEN Autonomy NXTGEN Inspect
Tunnel Jet Fan Inspection

Inside the tunnel. Without closing it.

Autonomous robotic inspection of jet fan systems in live road tunnels — removing the need for confined space entry and traffic shutdowns.

The Problem

Jet fan inspection in live tunnels requires confined space entry under traffic management — a high-risk, high-cost operation.

01

Confined space with live traffic hazards

Road tunnel jet fan systems must be inspected regularly for structural integrity, mechanical condition and operational readiness. Traditional inspection requires personnel to enter the tunnel — a confined space with live traffic, exhaust atmosphere and noise hazards.

02

Extensive safety overhead

Each inspection requires atmospheric testing, rescue standby, extensive traffic management planning and multi-agency coordination — a significant safety management burden on top of the inspection itself.

03

Constrained inspection windows

Inspection windows limited to overnight or off-peak periods create significant scheduling constraints and cost — restricting how often inspections can occur and compressing the time available to complete them.

The Solution

Robot enters. Team doesn't.

NXTGEN deploys a custom autonomous robotic system configured for tunnel environments — navigating to each jet fan installation, capturing inspection data and delivering a complete condition report without any personnel entering the confined space.

  1. Autonomous platform deployed
    A custom robotic system configured for tunnel environments navigates to each jet fan installation — operating in live traffic conditions without requiring a full tunnel closure.
  2. Inspection payload
    Visual and vibration sensors capture fan blade condition, mounting integrity, housing cracks and operational status indicators — a complete structural and mechanical assessment in a single pass.
  3. AI analysis
    NXTGEN Inspect processes captured data for defect classification, condition scoring and maintenance priority — automatically applied across every jet fan in the inspection programme.
  4. Report delivered
    Full jet fan condition report generated automatically — no manual compilation, no confined space entry required. Each report linked to the asset register and timestamped for compliance records.
Ceiling-mounted inspection carriage beside tunnel jet fan
The Outcome

What the deployment delivered.

Confined space entry eliminated

Robotic inspection removed the primary safety risk from the jet fan inspection programme — no personnel in the tunnel during inspection operations.

Traffic impact reduced

Inspection during live traffic conditions — no full tunnel closure required, no extensive traffic management arrangements, no multi-agency coordination overhead.

Scheduled compliance maintained

Inspection frequency increased without increasing personnel risk or cost — compliance with inspection interval requirements maintained across the full jet fan asset base.

Evidence-linked records

Every inspection produces an auditable condition record linked to the asset register — inspection evidence stored and retrievable for regulatory and operational reporting.

Remove personnel from your highest-risk inspection environments.

Talk to NXTGEN about deploying autonomous inspection in tunnels and confined spaces across your asset portfolio.

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