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 X-350 Fully Re-directive Terminal End

The X-350 is the WORLDS FIRST fully re-directive guardrail terminal end that can be used in Median, Tangent or Flared (up to 1200mm) installations.

With the length of need starting at post 1, instead of post 3 (as in other terminals) the X-350 provides a greater length of protective barrier reducing the cost of installation. During end on impacts, the X-350 absorbs energy at the impact head rather than  transferring the resistance down the rail. Impact testing conducted at a 15° angle, showed the vehicle was re-directed and controlled instead of passing to the backside of the terminal.

As a result of further NCHRP 350 compliance crash testing on the X-350 Terminal End, the steel post  X-350 Terminal Ends can also be installed at the higher height of 31” (787mm).

With the increase of 85mm from the ‘standard’ installation height this allows the NuGuard 31™ steel guardrail system to be terminated with an X-350 Steel Post Terminal End, without the need to have a height transition section over 2 lengths of W-section guardrail.

Click here for Installation Instructions.


  Approved to NCHRP 350 TL-3
  Fully re-directive
  Length of need (LoN) at post one
  Improved vehicular control
  Impact force held in tension - less chance of kinked rail
  Little or no debris scatter
  Ease of installation and maintenance
  3 x Standard highway rails 12 gauge
  Impact head weighs only 25 kg’s
  Designed & manufactured in NZ
  Patented technology


  Speed:100 kph NCHRP 350 TL-3
  Length: 11.4m (3rails)

Offset: 0 - 1200mm (except for Median)

  Install Height:  690mm or 790mm to suit guardrail system 
  Post 1: Steel
  Posts 2 - 6: Breakaway timber or steel (Median is steel only)
  Run out – 22.5m x 6m
  LoN starts at Post 1
  Max grade 10:1
  Max deflection – 980mm
  All steel components hot dipped galvanised


Technical Note

X-350 End Terminal installed in a trailing/exit location - Lapping of rail

When a X-350 End Terminal is installed in a trailing/exit location, where the terminal head is facing away from the direction the vehicle is travelling, the splice join at rails 1, 2 and 3 of the terminal will be against the direction of traffic. 

Please note this situation is different from the X-350 Terminal End being installed in a leading/entry location, where the terminal head is facing towards the vehicle, the rail then laps in the conventional way, in the direction of traffic.

To view X-350 Lap Direction Sketch click here (PDF 17.5KB).

Note: For any existing installations that have not been installed correctly the splice join to change is from rail 2 to 3 only.

If you require any further clarification of this detail please contact your local CSP Pacific Sales Engineer or Customer Services on 0800 655 200 or

Standards and Acceptance

The X-350 has been 100% designed and crash tested to NCHRP 350 TL-3 in NZ. Click here (PDF 1.15 MB) for FHWA TL-3 acceptance letter.

Listed as accecpted for use in NZ Transport Agency Specification M23 Appendix A

X-350 Terminal End accessories

X-350 Plastic Front End Cover

The X-350 Plastic Front End Cover is available for both roadside and median terminal ends as an optional extra. This light weight cover is ideal for use in urban areas where the X-350 ground strut and cables may be a trip hazard to members of the public. The X-350 Plastic Front End Cover can easliy be fitted to new or existing installations of the X-350 Terminal End.

X-350 Nut Protectors

The X-350 Nut Protectors are available for all X-350 Terminal Ends. They protect pedestrians and cyclists from exposed splice bolt nuts and threads.

To view images of the X-350 Plastic Front End Cover and X-350 Nut Protectors click here.

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Product Literature
> Median Brochure >
> Median Installation Manual >
> Median Check List >
> Tangent & Flared Brochure >
> Tangent and Flared Installation Manual >
> Tangent and Flared Check List >
> Barrier Field Manual >
> X350: 31 Installation Manual >
> Bolt Down End Terminal Check List >
> Technical Drawings >>
FAQs >
Crash Test Videos
Installation Video