Districts Impacted
Project Summary
The Exit 93 interchange connects southbound Kingshighway traffic to Interstate 55 or Route 74. The bridge in this location is referred to as a “flyover,” and it is in poor condition. The flyover was constructed in 1961 and currently carries more than 6,000 vehicles a day.
“After MoDOT and consulting engineers reinspected the flyover bridge, it was determined the bridge could be rehabilitated to extend its life,” explained MoDOT Project Manager Tim Pickett.
Along with the rehabilitation of the flyover bridge, two bridges on northbound I-55 will be rehabilitated—this includes the bridge over BNSF railroad near Route 74 and the bridge over Route 74.
“Additionally, the project will implement phase one of the preferred plan for Exit 93 that was shared at the public meeting on July 27, 2022,” said Pickett.
Pickett added this includes replacing the signals at Silver Springs Road with a two-lane roundabout in an effort to improve safety. The project will also close access ramps at Route 74.
Tentatively, the project is expected to be let in February 2026. Construction could begin as early as April 2026.
In anticipation of the flyover closure, signals will be installed at the Route 74/I-55 interchange. Motorists will be encouraged to use this access to I-55 during construction. The construction of the roundabout at Silver Springs Road and Business 61 will be staged to allow movement through the intersection.
Completion is anticipated in fall/winter 2028.
Completion of the roundabout will represent one phase of the improvement plan for the interchange. Additional phases could be completed as funding becomes available in the future.
Public Meeting Materials for August 27, 2024
View the Phase 1 Aerial
Constructing a roundabout at 61/Silver Springs; rehabbing the 61 bridge over I-55, NB I-55 bridge over BNSF railroad, and NB I-55 bridge over MO 74; and removing SB I-55 merge from 74 and Exit 93A.
Constructing a roundabout at 61/Silver Springs; rehabbing the 61 bridge over I-55, NB I-55 bridge over BNSF railroad, and NB I-55 bridge over MO 74; and removing SB I-55 merge from 74 and Exit 93A.
Roundabout Plan View
While signalized intersections have approximately 20-30 conflict points, or spots where vehicles could collide, roundabouts reduce that number to eight.
While signalized intersections have approximately 20-30 conflict points, or spots where vehicles could collide, roundabouts reduce that number to eight.
Truck Movements
Roundabouts are designed with a truck apron to accommodate large vehicles like school buses, semi-trucks, or farm equipment.
Roundabouts are designed with a truck apron to accommodate large vehicles like school buses, semi-trucks, or farm equipment.
Meeting Handout
Completion of the roundabout will represent one phase of the improvement plan for the interchange. Additional phases could be completed as funding becomes available in the future.
Completion of the roundabout will represent one phase of the improvement plan for the interchange. Additional phases could be completed as funding becomes available in the future.
Exit 93 Phase 1 SImulation
Project Timeline
Learn More About Roundabouts
About Roundabouts
Driving in circles can be a good thing, if it means you get where you want to go quicker and safer. That’s why the Missouri Department of Transportation is using roundabouts as a way to manage traffic at some intersections. This video will help you better understand how to navigate a roundabout, plus explain the many benefits they have compared to traditional traffic signal intersections.
Navigating a Roundabout:
When approaching a roundabout, you will see a dashed white line and a yield sign at each entry point. Slow down, use your turn signal, look for oncoming cars, pedestrians, and bicyclists. When you see a safe opening, proceed into the roundabout. Follow the circle of traffic until you see the road you want to turn onto, then exit out of the roundabout. When entering a roundabout, remember, all vehicles already within the roundabout have the right of way. Do not enter a roundabout if an emergency vehicle is approaching a roundabout. If an emergency vehicle approaches while you are in a roundabout, exit immediately and pull over to the right side of the road. When navigating a multi-lane roundabout, observe roadside signs and pavement markings. These will direct you in the correct lane. Do not change lanes within a roundabout. Never turn left when entering a roundabout. When exiting, be sure to use your right turn signal.
For More Information
Tim Pickett
Title
District Design Engineer
Department
Southeast District
Contact Info
(573) 472-9003
(573) 472-9003
Chris Crocker
Title
Project Manager
Department
Southeast District
Contact Info
(573) 380-1658
(573) 380-1658