(a) Use the traffic data given in the above problem and the equation derived in
ID: 1826825 • Letter: #
Question
(a) Use the traffic data given in the above problem and the equation derived in class on 02/21, to calculate the truck factor for the warehouse access road in question.
(b) After a couple of years, the same engineer is called upon to design an asphalticpavement for the access road to another warehouse of the same supermarket chain. This time, he has been informed that the ADT of the access road is approximately 600 with 75% of the traffic consisting of trucks. Assuming a traffic mix more or less similar to the previous case [i.e. Assignment #3] and a growth rate of 2.5%, compute the cumulative ESALs for a 15 year design period for the second access road, USING the truck factor calculated in part (a).
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PROBLEM
33 automobiles (about 2.5 kips) with two single axles
12 trucks with 2 single axles (about 20 kips)
8 trucks with 1 single axle (about 10 kips) and 1 tandem axle (about 25 kips)
3 trucks with 2 single axles (each about 10 kips) and 1 tandem axle (about 35 kips)
2 trucks with 1 single axle (about 20 kips) and 2 tandem axles (each about 35 kips)
On the following morning, he also found out from the security guard that during the previous night, about 50 more trucks having more or less the same axle load distribution as the day time truck traffic, had used the access road.
Assuming a design with single lanes in each direction and a growth factor of 2%, plot the cumulative ESALs up to the expected design life of 15 years (in 1 year intervals).
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