The Missouri Department of Transportation is expanding its planned Interstate 70 closure next weekend.

MoDOT will now close westbound I-70 from the Missouri 291/Interstate-470 interchange to the Interstate 435 interchange from 10 p.m., Friday, Feb. 21 to approximately 5 a.m., Monday, Feb. 24. The closure is to demolish the old Interstate 435 bridges above I-70, part of the ongoing interchange reconstruction. Eastbound I-70 will be closed at I-435, with traffic rerouted to southbound I-435.

MoDOT initially planned to just close westbound I-70 at the I-435 interchange, with traffic rerouted to northbound I-435. The department said it decided to close westbound I-70 further east “after further consideration of traffic impacts.”

Crews will begin reducing lanes on westbound I-70 from the I-470 interchange to I-435, as well as eastbound I-70 at I-435, at about 8 p.m. Feb. 21. Beginning at 9 p.m., crews will begin closing all on ramps to westbound I-70 between the two interchanges. That includes: M-291/I-470, Lee's Summit Road, Noland Road, U.S. 40 and Blue Ridge Cutoff. The on ramp from Manchester Trafficway to eastbound I-70 will also be closed at that time.

By 10 p.m., westbound I-70 traffic will be reduced to one lane before M-291/I-470 and any remaining traffic at that interchange will be rerouted to southbound I-470.

In addition, the ramp from northbound I-435 to eastbound I-70 will be closed from 5 a.m., Saturday, Feb. 22 until about 5 p.m. the same day for pavement repairs. The ramp will be open at all other times.

Crews have already constructed new I-435 bridges over I-70. They have removed the left exit ramps from I-435, to be replaced by right-exit flyover ramps, and have removed the right-exit loop ramps from I-70 to reconfigure them. MoDOT says the interchange reconstruction project is scheduled to be completed by December.