Lower Wacker Drive
Lower Wacker saw a series of improvements from Randolph to Congress. The deteriorated viaduct structure built in the 1950s was replaced, lifting the vertical clearance by more than one foot. New lighting improves visibility and new ventilation equipment improves air quality. The service drive and through lanes on Lower Wacker were also separated, alleviating congestion and expediting traffic.
Upper Wacker Drive
Significant improvements were made to Upper Wacker Drive from Randolph to Congress.
Ramps to Lower Wacker Drive at Jackson, Adams and Washington were removed and replaced with landscaped medians. In addition to the medians, Upper Wacker Drive was outfitted with sidewalk planters and decorative light fixtures. The ramp at Monroe was removed and replaced with a new one-way ramp to Lower Wacker Drive.
Congress Parkway Interchange
The Congress Parkway Interchange reconfiguration improved traffic safety and created new green space. Improvements included moving the eastbound Congress exit ramp at Franklin below ground and moving the Lower Wacker Drive entrance ramp onto westbound Congress below ground. These improvements allowed for the creation of a new, three-acre park.
Traffic improvements included removing the Franklin ramp onto westbound Congress, which eliminated the double-merge with the Lower Wacker Drive ramp onto westbound Congress. Additionally, the Lower Wacker ramp now has a longer merge lane.