Nebraska DOR; FHWA
Cracking; Crumb rubber; Dowel bar retrofit; Overlays (Pavements); Pavement performance; Subbase (Pavements); Technological innovations
Many innovative pavement technologies have been introduced into the Nebraska road system by the Nebraska Department of Roads (NDOR) during the past decade. These include retrofitting of dowel bars into pavement joints, continuous "daylighting" of granular subbase material, lime and fly ash modified subgrades, longitudinal tining, portland cement concrete (PCC) overlays for asphaltic concrete, crumb rubber overlays, microsurfacing and many others. This study was funded to determine if these new technologies produce pavements that perform in a superior manner to the preceding technologies. This research will evaluate a specified number of pavement sections where innovative technologies have been used and compare these sections to nearby conventional pavement sections. Analysis will include cracking index, faulting index, international roughness index, cracking at joints and other selected criteria appropriate for the pavement type.