ST. CHARLES (KMOV) – Plans for a new diverging diamond interchange on I-70 at Mid Rivers Mall Drive are underway.
Lane additions on I-70 from Mid Rivers Mall Drive to Highway K in O’Fallon are also being developed.
St. Charles County Transportation director John Greifzu said the project will cost around $14 million and will be completed by 2013.
Funding for the new diverging diamond will come from the East-West Gateway Council, MoDot, St. Charles County and the City of St. Peters.
The new interchange is going to be similar to the one built at Dorsett Road at I-270 in St. Louis County and will move motorists with fewer delays.
Lane work on westbound I-70 and miscellaneous improvements to Highway 79 will also be made to help move traffic during evening rush hour.
“The bottleneck of traffic on I-70 between Highway 370 and Highway 79 long has been a nightmare for commuters,” County Executive Steve Ehlmann said. “The County has been working for the last 10 years to alleviate this congestion. When completed, this project will help a great deal.”
Ehlmann also said an additional $4 million was approved by the council to make traffic signal improvements throughout the county.
Work on the new diverging diamond will begin in 2012.
The County plans to finish all traffic signal improvements before the Blanchette Memorial Bridge closes at the end of next year so motorists spend less time waiting at red lights.