QI: The predicted traffic mix of a proposed four-lane urhan freeway: • Passenger cars = 69% Single-unit trucks: o 2-axle, 5000 lbíaxle - 20% o 2-axle, 9000 Ib'axle = 5% o 3-axle or more 23,000 lb'axle = 4% Tractor semitrailers and combinations o 3-axle 20,000 Ib/axle = 2% The projected AADT during the first year of operation is 3500 (both directions). If the traffic growth rate is estimated at 4% and the design life = 20 years, determine the total equivalent single axle load (ESAL). Assume the design lane factor fa is 0.42, pt 2.5, and SN= 3.
QI: The predicted traffic mix of a proposed four-lane urhan freeway: • Passenger cars = 69% Single-unit trucks: o 2-axle, 5000 lbíaxle - 20% o 2-axle, 9000 Ib'axle = 5% o 3-axle or more 23,000 lb'axle = 4% Tractor semitrailers and combinations o 3-axle 20,000 Ib/axle = 2% The projected AADT during the first year of operation is 3500 (both directions). If the traffic growth rate is estimated at 4% and the design life = 20 years, determine the total equivalent single axle load (ESAL). Assume the design lane factor fa is 0.42, pt 2.5, and SN= 3.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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