The human costs for a fatal are an interesting one to consider...
lets pick a number out of the air in order to justify whatever we want wrote:
human costs, based on WTP values, which represent pain, grief and suffering to the casualty, relatives and friends, and, for fatal casualties, the intrinsic loss of enjoyment of life over and above the consumption of goods and services.
They quote an average number of £860,380 for the human cost.
But the same government has quite different figures for the human cost (or compensation paid anyway) if it isn't a road accident - lets take a terrorist attack for instance
BBC reporting on compensation from UK government for people killed in July terrorist attacks wrote:
Government rules mean bereaved families get £11,000...
A slight discrepancy perhaps?
http://news.bbc.co.uk/1/hi/england/london/4363040.stm