I couldn't find any information about this specific test, but it seems likely that it would be based on NCHRP recommended procedures: https://onlinepubs.trb.org

I couldn't find any information about this specific test, but it seems likely that it would be based on NCHRP recommended procedures: https://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_350-a.pdf https://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_350-a.... . Of interest is the table on page 16 (pdf page 26) - if they used the test designed for the 2000P vehicle (2000 kg pickup, see page 10/20) that would probably mean an impact angle of 25 degrees.