The 3900 South overpass will be closed Friday and Monday nights as workers switch the traffic lanes onto the newly completed north half of the bridge.

Wasatch Constructors, the I-15 reconstruction contractor, will close the bridge from 10 p.m. Friday until 8 a.m. Saturday, and from 10 p.m. Monday until 6 a.m. Tuesday.The I-15 reconstruction schedule is subject to change. For the latest updates, call 1-888-INFO-I15 or check the contractor's Web site at (