The Oklahoma Department of Transportation selected MacArthur Associated Consultants (MAC) to serve as the Program Manager for the $670 million I-40 Crosstown Realignment. The original I-40 Crosstown Expressway, built in 1965, was constructed to carry 75,000 vehicles daily. By 2008, more than 100,000 vehicles were traveling on the roadway daily. Federal funding was approved in May 2002 to construct the largest transportation project in state history, to relocate I-40 to the south along a former rail alignment.
MAC provided mainline and interchange concepts resulting in final functional design plans for the interchanges at I-40, I-235/I-35, and I-40/I-44. MAC also provided the overall drainage study, utility coordination, right-of-way plans, and overall project management coordination for the final design development of the construction plans.