For any Conway commuters who drive on I-430 and I-630 in Little Rock, a reminder has been sent from the Arkansas Highway Commission to stay away from that area on Wednesday.

Workers will begin shifting lanes in the I-430 southbound lanes of the Big Rock Interchange (I-430/I-630) at 9 a.m. Delays are expected for 18-21 hours as a combination of lane closures involving one to two lanes will occur.

According to the commission, drivers need to be aware that after the shift is made the most significant change will be a relocated I-430 southbound exit ramp and for I-630 east or Financial Center Parkway west.

The new exit will be located south of the present location. The first southbound exit will remain in the current location, but will change to a Markham Street only exit. The second exit will be the new off ramp for I-630 and Financial Center Parkway. Message boards will be in place to help direct motorists.

The southbound lanes of I-430 between Markham Street and

I-630 need to shift to accommodate the next stage of construction. After the shift is completed, this traffic pattern will remain in place for approximately four to five weeks. Three southbound lanes into the interchange are currently in place and will remain after the transition, but lane widths will be reduced, and the advisory speed will be 40 mph through the area.

The $124 million interchange modification project will continue through 2014.