highway 64  
  The Highway 64 Construction Project in St Louis was a major undertaking by the Missouri Department of Transportation (MoDOT) to upgrade and modernize a section of Interstate 64 that was built in the 1950s and 1960s. The project involved rebuilding and widening the pavement, bridges and interchanges between Spoede Road in St. Louis County and Kingshighway Boulevard in St. Louis City. The project also improved safety, traffic flow and aesthetics along the corridor.

The project was completed in two phases, with the west half of the project (between Ballas Road and I-170) closed for construction from January to December 2008, and the east half of the project (between I-170 and Kingshighway Boulevard) closed for construction from December 2008 to December 2009. The project was delivered using the design-build method, which combined design and construction into one contract, allowing for faster and more efficient completion. The project cost $524 million and was completed by MoDOT's contractor, Gateway Constructors.

The Highway 64 Construction Project in St Louis was a significant achievement for MoDOT and the region, as it provided a vital interstate-to-interstate connection between I-64 and I-170, and prepared the roadway system for future development opportunities in the city, such as the National Geospatial-Intelligence Agency relocation. The project was celebrated by more than 20,000 people who attended the "Fun on the Freeway" event on December 6, 2009, before the highway was reopened to traffic on December 7, 2009.