The Mid Rivers Mall Drive diverging diamond interchange is NOW OPEN.
To learn more about how to drive a DDI, view the You Tube video below.
MoDOT constructed the Interstate 70 and Mid Rivers Mall Drive interchange as a diverging diamond interchange (DDI). This project is a cost share with the city of St. Peters and St. Charles County.
Federal, state, county and city officials took part in the ribbon cutting ceremony November 8, 2013.
Some of the advantages of a diverging diamond interchange include free turns for motorists, meaning vehicles don’t cross opposing traffic. Traffic models indicate this type of interchange works well with areas of heavy traffic, such as Mid Rivers Mall Drive.
Heavy congestion also exists due to traffic exiting Interstate 70, motorists entering and exiting Mid Rivers Mall, and interchange access to Main Street.
The Interstate 70 and Mid Rivers Mall interchange, looking west as it currently exists. NOTE: The closure of
the westbound exit ramp and the temporary exit ramp on the north outer road.
MoDOT has built numerous diverging diamond interchanges in Missouri, including the first DDI in the St. Louis region at the Interstate 270 and Dorsett interchange in the city of Maryland Heights.
This project also includes the construction of an added lane on westbound I-70 between Mid Rivers Mall Drive and Route 79.
MoDOT holds ribbon cutting ceremony for I-70 and Mid Rivers Mall Drive Project November 8
MoDOT to close Mid Rivers Mall Drive bridge over I-70 October 21-23 (10/18/13)
Several changes coming to I-70 and Mid Rivers Mall Drive ramps (10/8/13)
MoDOT to close lanes at I-70 at Mid Rivers Mall Drive and Route 79 this weekend (9/26/13)
MoDOT News Release: MoDOT to close I-70 at Mid Rivers Mall Drive for short periods overnight Monday (7/8/13)
MoDOT News Release: MoDOT to close left lane of Veterans Memorial Parkway at I-70 and Mid Rivers Drive 6/20/13
MoDOT News Release: MoDOT to close far right lane of westbound I-70 near Route 79 for three months 4/19/13
MoDOT News Release: MoDOT to close exit ramps temporarily at I-70 and Mid Rivers Mall Drive as project begins 3/12/13
Detour map (1 page, 711kb)
Construction stage 2 map (1 page, 1kb)
Construction stage 3 map (1 page, 1103kb)
DDI drawing (1 page, 502kb)
I-70 and DDI map (1 page, 1kb)
Fact sheet (2 pages, 35kb)
Westbound I-70 lane addition map 1 (1 page, 906kb)
Westbound I-70 lane addition map 2 (1 page, 876kb)
FOR MORE INFORMATION, CONTACT:
MoDOT St. Charles County Area Engineer Tom Evers at 1-888 ASK MODOT (275-6636)
MoDOT Transportation Project Manager Tim Schroeder at 1-888 ASK MODOT (275-6636)
MoDOT Customer Relations Specialist Jack Wang at 1-888-ASK-MODOT (275-6636)