US Route 45 Full Cloverleaf Interchange | Illinois Department of Transportation

The S-shaped curve at US 45 at IL 171 was a high-accident location until Knight provided engineering design services to redesigned as a full cloverleaf intersection. The new design increased safety, added additional traffic lanes and met current standards for curvature, decision distance, weaving, and recovery. Adjacent to a Forest Preserve the project design incorporated innovative design elements to protect plant and wildlife.

Engineering Services Provided:

  • Location/Design Reports
  • Environmental Assessment
  • Railroad Structures
  • Drainage Studies
  • Traffic Studies
  • Safety Studies
  • Community Involvement