The Safety Performance functions for injury, fatal and property damage only crashes are:SPinj = 1.602× 10−6(length in feet)(AADT)0.491 (21)SPfatal = 0.03× 10−6(length in feet)(AADT)0.491 (22)SPpdo = 3.811× 10−6(length in feet)(AADT)0.491 (23)For the data given below, determine using the EB method:(a) the long term average number of injury crashes per year at the site(b) the long term average number of fatal crashes per year at the site(c) the long term average number of property damage only crashes at the site Data:▶ Length of road segment = 7585 ft▶ AADT = 5250 veh/day▶ Total number of injury crashes for 10 years = 12 Total number of fatal crashes for 10 years = 3▶ Total number of property only damage crashes for 10 years = 48▶ Assume k = 2.51
The Safety Performance functions for injury, fatal and property damage only crashes are:
SPinj = 1.602× 10−6(length in feet)(AADT)0.491 (21)
SPfatal = 0.03× 10−6(length in feet)(AADT)0.491 (22)
SPpdo = 3.811× 10−6(length in feet)(AADT)0.491 (23)
For the data given below, determine using the EB method:
(a) the long term average number of injury crashes per year at the site
(b) the long term average number of fatal crashes per year at the site
(c) the long term average number of property damage only crashes at the site
Data:
▶ Length of road segment = 7585 ft
▶ AADT = 5250 veh/day
▶ Total number of injury crashes for 10 years = 12
Total number of fatal crashes for 10 years = 3
▶ Total number of property only damage crashes for 10 years = 48
▶ Assume k = 2.51
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