Abstract
The Moving Ahead for Progress in the 21st Century Act highlighted the need to monitor the performance of pavement sections over time. An important aspect of performance monitoring is collecting a statistically significant sample of the network so conclusions can be made about changes in performance and types of maintenance and rehabilitation needed for maintaining these assets. This paper reviews the sampling requirements on the Interstate highway system to draw accurate conclusions about the network. Specifically, the paper answers the following questions: Is two-way data collection necessary? Do data have to be collected in more than one lane in a direction? What is the optimum reporting length? For what percentage of the network should data be collected? Should data be collected annually?
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