What is the driving test & seat belt equivalent of preventing Suicide?

The sad case of Robin Williams and his suicidal depression has brought the subject into polite conversation.  This graph shows how much easier it has been to talk about the visible problem of road deaths and easier to avoid the invisible subject of suicide.  A car accident is not necessarily the victim's fault; suicide by its very nature is seen as a personal choice - though depression can make it less an option and more like a compulsion.

You can see in this graph of a 100 years of car and population growth that more effort has gone into preventing Road deaths than Suicide.  Everyone now takes a driving test and wears a seat belt for even the shortest journey.  You can almost see the introduction of the driving test (1934), drink driving tests (1967) and compulsory seat belts for those in the front seat (1983). Car design is certainly safer.

Are there anti-depression activities we could all adopt that would be the equivalent?

The Red line is UK Suicides since 1901.  The Blue line is Road Traffic fatalities since 1926.  Scraping along the bottom of the scale are Railway Passenger fatalities since 1900.  It excludes suicide by train which is included in the Suicide figures.  (In the UK Suicide by Train has been running at around at about 150-200 annual deaths since 1995)

The reports of 1876 were full of accidents and wrecks.  Hundreds would be lost at sea or dozens die in train crashes.  I researched the stats to find out how fatal travel could be.  Although I could not find reliable shipping fatality figures, the interesting result I found was that suicide was just as deadly as transport.

www.in1876.com

Source:
Road Traffic Fatalities: Department of Transport (https://www.gov.uk/government/statistical-data-sets/ras40-reported-accidents-vehicles-and-casualties#table-ras40001)
Rail Passenger Fatalities 1900 - 1948: Railway Archives
Rail Passenger Fatalities 1949 - 2011: Rail Board Ltd
Suicides:  Office of National Statistics & Samaritans