A section of a two-lane rural highway is to be realigned and replaced by a four-lane...
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A section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full- depth asphalt pavement. The AADT (both ways) on the existing section can be represented by 500 ESAL. It is expected that construction will be completed 5 years from now. If the traffic growth rate is 5% and the effective CBR of the subgrade on the new alignment is 85, determine a suitable depth of the asphalt pavement using the AASHTO method. Take the design life of the pavement as 20 years. The resilient modulus of the asphalt (EAC) is 400,000 lb/in2. Assume mi for the subgrade is 1 and the percent of traffic on the design lane is 45%. Use a reliability level of 90%, a standard deviation of 0.45, and a design serviceability loss of 2.0. Note, the pavement is only one full depth of Asphalt (only D1 is determined) A section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full- depth asphalt pavement. The AADT (both ways) on the existing section can be represented by 500 ESAL. It is expected that construction will be completed 5 years from now. If the traffic growth rate is 5% and the effective CBR of the subgrade on the new alignment is 85, determine a suitable depth of the asphalt pavement using the AASHTO method. Take the design life of the pavement as 20 years. The resilient modulus of the asphalt (EAC) is 400,000 lb/in2. Assume mi for the subgrade is 1 and the percent of traffic on the design lane is 45%. Use a reliability level of 90%, a standard deviation of 0.45, and a design serviceability loss of 2.0. Note, the pavement is only one full depth of Asphalt (only D1 is determined)
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