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Originally built by Ajax in the 1980s, the Vehicle Dynamic Area was in dire need of a new design and upgrade. Ajax was involved with every aspect of removal and reconstruction of the existing VDA and construction of a new 30-degree banked, high-speed parabolic return road. The newly designed 139,000 square-yard VDA pad required a 12-inch crushed limestone base course, 5 inches of HMA pavement, and a wearing surface of 1.5-inch HMA Superpave mixture specifically designed for a surface coefficient of friction of 90mu.
Stringent ride quality specs required an International Roughness Index (IDI) of 30 measured longitudinally and diagonally. An MDOT mix design was used for the project with three lifts required to make the 5-inch pavement. Keeping with Bosch’s “green” commitment, a portion of the existing asphalt pavement was recycled and mixed with on-site materials for the track’s shoulders.
If you’ve flown ‘in or out’ of Michigan or Florida, there’s a solid chance you’ve experienced our work firsthand. The same goes for many of the roads and highways in the midwest. Even if you don’t think you’ve driven on our work, there’s a good possibility the safety, drivability, and performance of your vehicle was tested on one of the many test tracks we developed for Ford, GM, and other manufacturers. Even NASCAR® trusts our quality results for their high-spec precision tracks. When we say ‘The Future is Riding on Ajax’... we mean it. Since 1951, we’ve had our hands in some of the most demanding and challenging paving jobs in the Midwest. We’re proud of the work we do and continue to operate guided by the same principles set in place by our founder Herb Jacob; Quality, Safety, and Productivity.
::BLOCK:: ::PROJECTS::32::Michigan - Asphalt Construction ::BLOCK::
::BLOCK:: ::PROJECTS::30::Michigan - Concrete Construction ::BLOCK::
::BLOCK:: ::PROJECTS::31::Michigan - Racetracks & Test Tracks ::BLOCK::
::BLOCK:: ::PROJECTS::33::Michigan - Runways & Taxiways ::BLOCK::