Diverging Diamond Interchange


Illinois Department of Transportation


Naperville, Illinois
OMEGA provided construction engineering services to the Illinois Department of Transportation on this $100 million project to reconstruct and widen a three-mile portion of Route 59 to three lanes in each direction. The project included widening and resurfacing of Illinois Route 59 and side streets, as well as advance mainline work and interchange reconstruction.

Project Scope

The project included the reconfiguration of the existing typical diamond interchange at I-88 into a Diverging Diamond Interchange, the first interchange of its kind in northeastern Illinois. As well as removing and replacing the Illinois Route 59 bridge over the Ronald Reagan Memorial Tollway (I-88) interchange with two new independent bridge structures.


  • 2016 ACEC Engineering Excellence Award
  • 2016 APWA Chicago Metro Chapter’s Project of the Year Award