Projects Transportation

Michigan DOT Sprinkle Road Interchange Reconstruction

Kalamazoo, Michigan

DLZ provided design services for the reconstruction of I-94 at the Sprinkle Road Interchange. The primary purpose of this project was to replace two existing deteriorated bridges over I-94 with one bridge while upgrading the interchange. This project included two roundabouts and ramp reconstruction. Tasks included complex roundabout and ramp geometrics, complex bridge design, drainage design, municipal utility design, driveway design, cost estimates using SAPW, temporary traffic signals, multi-stage maintenance-of-traffic (including CPM and detours), complex traffic analysis for the Transportation Management Plan (TMP), design assistance for alternatives, ramp superelevations, horizontal and vertical alignments, an MSE retaining wall, roundabout and freeway signing and pavement markings, detail grades, and right-of-way plans.

The bridge at this interchange involved a severe skew angle which was a significant challenge. The roundabouts for this project had to be designed to accommodate an extremely long oversize truck used to transport bridge beams that are manufactured nearby. The maintenance-of-traffic design for this project was complex due to MDOT’s stringent requirements for I-94 lanes to remain open as well as significant vertical grade differentials between closely spaced work zones and temporary travel lanes. The DLZ team included several key subconsultants, so team coordination added a layer of complexity to the project as well.

The project was in compliance with AASHTO and MDOT standards, specifications, and provisions.