I think some research suggests that lack of easy immediate access to effective methods of suicide like guns can decrease suicide rates.<p><a href="https:&#x2F;&#x2F;www.psychologytoday.com&#x2F;blog&#x2F;struck-living&#x2F;201012&#x2F;can-obstacle-prevent-suicide" rel="nofollow">https:&#x2F;&#x2F;www.psychologytoday.com&#x2F;blog&#x2F;struck-living&#x2F;201012&#x2F;ca...</a><p>Edit: If a lot of people are committing suicide by train guard rails and similar measures might help.