Motorists traveling through the 146th Street and Allisonville Road area should prepare for temporary closures and lane reductions beginning the evening of Monday, June 9, as crews implement a new phase of construction.  The change had originally been set earlier, but weather forecasts resulted in new plans.

According to a government announcement, the phase switch is set to begin at 7:00 p.m. Monday, and will involve movement restrictions lasting into early Tuesday morning.

Here is the expected schedule and impact:

• 7:00 p.m. to 10:00 p.m., June 9: One lane of traffic in each direction on 146th Street will be closed within the construction zone. Crews will place temporary pavement markings and adjust barrier walls during this period.

• 10:00 p.m., June 9 to 5:00 a.m., June 10: All ramps between 146th Street and Allisonville Road will be fully closed. One lane will remain open on 146th Street using the bridge over Allisonville. Northbound and southbound Allisonville Road will also be reduced to one lane under the bridge. A short closure of Allisonville Road around 10:00 p.m. is expected as crews remove a traffic signal.

• 5:00 a.m. to 6:00 a.m., June 10: Ramps will reopen, but the north and south entries of the roundabout will be closed briefly for final pavement markings. Vehicles using the northeast and southwest ramps will only be able to turn right onto Allisonville Road during this time.

• 6:00 a.m., June 10: All lanes and movements are scheduled to fully reopen.

Officials urge drivers to avoid the area if possible during the overnight work and to use caution if traveling through the construction zone. Delays are expected, particularly during the lane and ramp closures.

The traffic changes are part of the ongoing infrastructure improvement project in the are