Quantitative metrics to assess the effectiveness and efficiency of winter maintenance operations. These metrics can be input based (such as the amount of materials used), output based (amount of material dispensed per mile of pavement), or outcome based (time for average vehicle speed to return to pre-storm values). reference: NCHRP Research Report 889 Performance Measures in Snow and Ice Control Operations link: https://www.trb.org/Publications/Blurbs/160764.aspx
Source: AASHTO Winter Weather Management Technical Service Program