which method will last longer 3" of id3 versus seperate wearing and base courses of id2 totaling 3 1/2"

this is a overlay of a parkinglot. milling and petromat installed where needed

Answers:

From: Michael Peyser

on interstate highways, there are three different layers of asphalt installed separately. each layer is laid and cured before installing the next layer. this process is done to make the road withstand heavy loads. thus two layers of id2 may last longer and withstand heavier loads than a single layer of id3.

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