DOT's VSL

From a U.S. Department of Transportation memo on Treatment  of the Economic Value of a Statistical Life in Departmental  Analyses from February 5, 2008:

Based on our improved understanding of the academic research literature, we have determined that the best present estimate of the economic value of preventing a human fatality is $5.8 million. This value should be used, effective immediately, for analyses performed by DOT analysts. In addition, we will, for the first time, require supplementary analyses at values for a statistical life higher and lower than $5.8 million. Specifically, analysts will prepare estimates based on assumptions of $3.2 million and $8.4 million for the value associated with each life saved. These additional estimates will assist decision-makers in recognizing the necessary imprecision of any assumption of the value of a statistical life, as well as the sensitivity of a cost-benefit calculation to changes in that value.

You might also try their Revised Departmental Guidance:  Valuation of Travel Time in Economic Analysis .