Grand Award – AECOM Technical Services, Inc., St. Louis
Project: I-44 at Route 141 Design-Build
Client: Missouri Department of Transportation
AECOM was the lead designer for the Pace Construction team to provide design-build services for improvements to Route 141 at the I-44 interchange in St. Louis. This project included the addition of the first thrU-turns in Missouri on Route 141 north of the Meramec River to ease congestion at the Vance and Marshall Road intersections. South of the river, new loop ramps were constructed at the 141/44 interchange to reduce the volume of traffic needing to turn left at a signal, while other existing ramps were widened to increase overall mobility. The project is highlighted by the construction of a new flyover ramp to carry traffic from southbound Route 141 to eastbound I-44.