National Highways suicide prevention standards: design implications for engineers
Reviewed by Joe Ashwell
First reported on The Construction Index
30 Second Briefing
National Highways has mandated suicide prevention assessments on all relevant new and upgraded road schemes after more than 60 suspected suicides a year on the UK’s road network, accounting for around 20% of road deaths. Designers must now consider measures such as higher parapets on overbridges, anti-climb or anti-jump barriers, and controlled access to high-risk structures during early option selection. The change embeds suicide risk into standard design and value-management processes, affecting highway structures, interchanges and roadside infrastructure nationwide.
Technical Brief
- Change will likely influence local highway authority standards where they mirror or reference National Highways design guidance.
Our Take
National Highways appears increasingly willing to embed non-traditional risk criteria into its standards, with suicide prevention now joining climate and low-carbon construction themes seen at the Lower Thames Crossing hydrogen initiative.
Making suicide risk assessment mandatory at design stage will likely affect current UK schemes such as the M3 Junction 9 upgrade and M4 embankment works, where bridge, parapet and access configurations may need revisiting before detailed design is locked in.
Within our 532 safety- and standard-tagged infrastructure pieces, National Highways features frequently as a rule-setter rather than just an asset owner, signalling that its guidance on UK roads is likely to become a de facto benchmark for other authorities and DBFO concessionaires such as UK Highways on the M40.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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