HWY/Signing Guarding/TBT-HWY-007

IPV (Impact Protection Vehicle) Use

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IPV (Impact Protection Vehicle) Use

Toolbox Talk Record

Ref: TBT-HWY-007  |  Issue: 1  |  Date: March 2026
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What?

  • An IPV (impact protection vehicle) is a truck-mounted crash cushion positioned to absorb the impact of errant vehicles.
  • IPVs protect road workers in the taper and works area from high-speed vehicle incursions on dual carriageways and motorways.
  • The vehicle is positioned upstream of the works to deflect or absorb a collision before it reaches the workforce.
  • Chapter 8 Part 2 of the Traffic Signs Manual sets requirements for IPV use on high-speed roads.
  • IPVs must be positioned at the correct standoff distance from the workforce as specified in the traffic management plan.
  • The crash cushion energy rating must match the speed limit and vehicle types expected on the road.
  • IPV drivers must remain in the cab during deployment with seat belts fastened at all times.
  • After any impact, the IPV and crash cushion must be inspected and replaced before works resume.
  • Warning lights, conspicuity markings, and rear-facing signs must be maintained clean and visible.
  • IPV deployment is typically required on roads with speed limits of 50 mph and above.

Why?

Protect workersErrant vehicles travelling at high speed enter roadworks zones despite signing. IPVs are the last line of defence for workers.
Absorb impact energyThe crash cushion absorbs collision energy progressively, reducing the severity of the impact for both the motorist and workforce.
Legal and client requirementChapter 8 Part 2 and National Highways requirements mandate IPV use on high-speed road schemes.
Do Don't
  • Position the IPV at the correct standoff distance specified in the TM plan.
  • Ensure the crash cushion energy rating matches the road speed limit.
  • Keep the IPV driver in the cab with seat belt fastened during deployment.
  • Maintain warning lights, signs, and conspicuity markings clean and operational.
  • Inspect the IPV and crash cushion before each deployment shift.
  • Replace the crash cushion immediately after any vehicle impact event.
  • Follow Chapter 8 Part 2 requirements for IPV positioning and operation.
  • Brief the IPV driver on the emergency procedure if the vehicle is struck.
  • Ensure the IPV is visible to approaching traffic at the required distance.
  • Record all IPV deployments and any impact events in the site daily log.
  • DON'T position the IPV closer to the workforce than the minimum standoff distance.
  • DON'T deploy an IPV with a crash cushion below the required energy rating.
  • DON'T allow the IPV driver to leave the cab during active deployment.
  • DON'T continue works after the IPV has been struck without replacing the cushion.
  • DON'T obscure warning lights or signs with dirt, materials, or equipment.
  • DON'T use an IPV that has not been inspected before the current shift.
  • DON'T park personal vehicles or plant between the IPV and the work area.
  • DON'T deploy the IPV on the wrong side of the carriageway from the taper.
  • DON'T rely on the IPV alone; maintain all other signing and guarding measures.
  • DON'T remove the IPV before the workforce has cleared the carriageway completely.

See also: Chapter 8 Signing and Guarding | Lane Closures and Contraflows
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