Abstract: Illinois is building its first all-asphalt, extended-life interstate project as a demonstration of the benefits of long-life flexible pavement design and implementation. The interstate being replaced was first built as a concrete pavement in 1969 and had outlived its original 20-year service life by receiving an overlay as a short-term repair. When the Illinois Department of Transportation proposed to replace it with concrete to accommodate the heavy truck traffic, asphalt interests asked for a chance to show how modern asphalt design could work. They proposed a full-depth asphalt pavement, similar to the perpetual pavement concept. Failures are easier to fix and can be done overnight. Responding to a legislative mandate to use only long- life pavements on high-volume roads, the DOT specified 17.5 inches of premium asphalt in five lifts. The article gives details on an 11-mile stretch where work began in August 2002.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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