The traffic on the design lane of a proposed four-lane rural interstate highway consists of 40% trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of operation is 1150, pi = 4.5, and pt = 2.5 .

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Q2: The traffic on the design lane of a proposed four-lane rural interstate highway consists of 40% trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of operation is 1150, pi = 4.5, and pt = 2.5 .

 

Growth rate = 3%

 

Design life = 20 years

 

Reliability level = 95%

 

Standard deviation = 0.45

 

The pavement structure will be exposed to moisture levels approaching saturation 20% of the time, and it will take about one week for drainage of water.

 

Effective CBR of the subgrade material is 7. CBR of the base and subbase are 70 and 22, respectively, and Mr for the asphalt mixture, 3102 MPa (450,000 lb/in2).

Q2: The traffic on the design lane of a proposed four-lane rural interstate highway
consists of 40% trucks. If classification studies have shown that the truck factor can be
taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure
if the AADT on the design lane during the first year of operation is 1150, pi = 4.5, and
pt = 2.5.
Growth rate = 3%
Design life = 20 years
Reliability level = 95%
Standard deviation = 0.45
The pavement structure will be exposed to moisture levels approaching saturation
20% of the time, and it will take about one week for drainage of water.
Effective CBR of the subgrade material is 7. CBR of the base and subbase are 70
and 22, respectively, and Mr for the asphalt mixture, 3102 MPa (450,000 lb/in?).
Transcribed Image Text:Q2: The traffic on the design lane of a proposed four-lane rural interstate highway consists of 40% trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of operation is 1150, pi = 4.5, and pt = 2.5. Growth rate = 3% Design life = 20 years Reliability level = 95% Standard deviation = 0.45 The pavement structure will be exposed to moisture levels approaching saturation 20% of the time, and it will take about one week for drainage of water. Effective CBR of the subgrade material is 7. CBR of the base and subbase are 70 and 22, respectively, and Mr for the asphalt mixture, 3102 MPa (450,000 lb/in?).
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