Project Completion— Construction of two mini roundabouts along Congress Parkway at Exchange Drive and Federal Drive was completed at the end of September, 2023. The City of Crystal Lake selected Clark Dietz to provide Phase II engineering services for the design of the roundabouts, with our services including data collection, geometric design, and ADA design. Clark Dietz provided the Phase II geometric design files, which followed the latest NCHRP and FHWA guidelines for roundabout geometrics.

“Clark Dietz not only provided an innovative design for our project, but they also structured their project plan around our unique needs. Their understanding of our vision was critical to the success of the project.”
Paul Walter P.E., Capital Engineering Manager Public Works
City of Crystal Lake, IL