On Tuesday night, construction crews were going to be doing a deck pour - pouring the concrete - at the new Wisconsin Avenue bridge.

Drivers, listen up.

The Zoo Interchange is completely shutting down overnight on Tuesday and a similar plan is in place for Wednesday night as well.

On Tuesday night, construction crews were going to be doing a deck pour - pouring the concrete - at the new Wisconsin Avenue bridge.

That bridge Crosses over I-41 and that's why drivers are being re-routed.

The Wisconsin Department of Transportation sees deck pours as a big moment in the project. From below crews will pump trucks-and-trucks worth of concrete onto the bridge.

Southbound I-41, Northbound I-41, and the ramp from Westbound I-94 to Northbound I-41 will all be closed until 4:30 a.m., Michael Pyritz, Southeast Region Communications Manager, Wisconsin DOT

"So Wednesday night, again this week, we are going to be doing the second of our deck pours on the new system ramp," Pyritz said.

That pour will be on the ramp from Eastbound I-94 to Northbound I-41/US-45. That is the highest structure within the new Zoo Interchange.

Like on Tuesday, starting at 8:30 p.m., crews will start shutting off lanes - closing them all at 11 p.m.

By morning the lanes will have re-opened with the concrete curing above.

"Well there is still a lot of work to be done. We are hoping to have this done by the memorial day holiday weekend. That is what we're targeting right now. But Mother Nature of course has an awful lot to say, whether we hit that mark or not," Pyritz said.

For more information on closure click here.