Table 7. Traffic count distribution Average Daily Traffic (vehicles per day) <500 501–1,000 1,001–1,500 1,501–2,000 2,001–3,000 3,001–4,000 4,001–10,000 > 10,000
Percent of Data Based on Number of Projects 32 34 16 5 5 2 4 2
Historical IRI and PCI records were then analyzed to achieve a better understanding of long-term performance behavior of concrete overlays in Iowa. Concrete overlay data shown in Figures 26 and 27 summarize the different types of concrete overlays used in Iowa roadways.
Figure 26. Distribution of overlay types based on number of projects
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