c = total of major roads in the 1 Loss factor of 100-200% from – city and surrounding area lost for probable” scenario “most one day 0 Loss factor >200% from – “most road loss factor = (a/c) x probable” scenario …then b as a % (Example - 10 miles of major road likely to be lost for two days, out of total of 100 miles of major road = road loss factor of 20% ((10/100) x 2) 8.6.2 Road survival of Road critical asset (RCA) loss 5 No loss of service even from Loss of service on critical access and – – “most critical access and factor. If: severe” scenario evacuation routes should if possible also evacuation routes include an estimate of the likely impact of traffic gridlock on access or evacuation rates. a = carrying capacity (vehicles 4 No loss of service even from – “most per hour) of probable” scenario evacuation/emergency supply routes to and from the city at risk 3 Loss factor of 1-25% from most – of becoming impassable probable” scenario event. 2 Loss factor of 25-100% from – b = # of days estimated before probable” scenario “most reopening 1 Loss factor of 100-200% from – c = carrying capacity (vehicles probable” scenario “most per hour) of all designated critical evacuation/emergency 0 Loss factor >200% from – “most supply routes probable” scenario then RCA loss factor = (a/c) x … b as a % (Example with carrying –route capacity of 1,000 vehicles per hour likely to be closed for 3 days, out of a total carrying capacity on all evacuation/
c = total of major roads in the city and surrounding area lost for one day …then road loss factor = (a/c) x b as a % (Example - 10 miles of major road likely to be lost for two days, out of total of 100 miles of major road = road loss factor of 20% ((10/100) x 2) 1 – Loss factor of 100-200% from “most probable” scenario 0 – Loss factor >200% from “most probable” scenario 8.6.2 Road – survival of critical access and evacuation routes Road critical asset (RCA) loss factor. If: a = carrying capacity (vehicles per hour) of evacuation/emergency supply routes to and from the city at risk of becoming impassable event. b = # of days estimated before reopening c = carrying capacity (vehicles per hour) of all designated critical evacuation/emergency supply routes … then RCA loss factor = (a/c) x b as a % (Example –route with carrying capacity of 1,000 vehicles per hour likely to be closed for 3 days, out of a total carrying capacity on all evacuation/ 5 – No loss of service even from “most severe” scenario 4 – No loss of service even from “most probable” scenario 3 – Loss factor of 1-25% from most probable” scenario 2 – Loss factor of 25-100% from “most probable” scenario 1 – Loss factor of 100-200% from “most probable” scenario 0 – Loss factor >200% from “most probable” scenario Loss of service on critical access and evacuation routes should if possible also include an estimate of the likely impact of traffic gridlock on access or evacuation rates.
Resilience%20Scorecard%20Updated%20V2%20-%20April%2030th%202015.docx