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Road safety barrier systems

Published: Oct 2009

This specification covers the requirements for road safety barrier systems used on state highways. This 2009 specification is currently under review. For further information, please contact

For further information refer to Technical Advice - Road Safety Hardware


  1. List of interim acceptance notices October 2014 added (for accepted hardware systems not currently listed in M23)
  2. Interim Appendix B Bridge Barrier Systems added
  3. Notification letters regarding system testing requirements and specification added
  4. Workshop registration and flyer information is now available in the road safety barrier training section below.

Publication details

  • Author: NZ Transport Agency
  • Published: Oct 2009
  • Also known as: NZTA M23
  • Version: Updated Oct 2014

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