The Marquette Interchange is an $800 million freeway interchange reconstruction project currently underway in Milwaukee, Wisconsin. More than 50 bridge structures in the project include eight curved steel box girder bridges on high-level interchange ramps. These structures are at heights of up to 125 feet above the ground, range in length from 900 feet to more than 2,000 feet, and have span lengths up to 250 feet.

Workflow in the conventional delivery model for bridge projects involves engineers first performing the structural analysis and design, using a variety of software packages and design tools, followed by drafting technicians transferring the design into a finished set of plans using MicroStation, with the potential for several iterations of markup and correction required. For the Marquette Interchange project, an automation effort made the work between engineers, technicians and others more seamless, timely and accurate.

Using MicroStation Visual Basic for Applications, the designer of these structures combined Bentley products with in-house software solutions in order to streamline the design and production process. This process provided the project team with superior quality control throughout the design stage.