This family of measures consists of emergency devices, information and contact arrangements to enable rapid intervention when problems occur. This information is usually displayed at stations posters, signs, screens, billboards etc. to provide passengers or bystanders the information on what to do when they see person at risk of suicide. Sometimes this information is designed to help directly the people with suicide intent by encouraging help seeking.

It is considered a technological family because it allows people to react in case of emergency and provides technical means which allow people to quickly transmit information in case of emergency.

Measures in this family are often referred to as: signage, posted information, electronic billboards, screens, posters, signs, helpline telephone numbers, crisis lines, lifelines, tele-help, helpline buttons, alarm buttons, emergency buttons, SOS poles, stop plungers.