Drivers in northern Arizona should prepare for traffic shifts and lane restrictions on Interstate 40 at Exit 191 in west Flagstaff as crews continue project work to replace a bridge. The location is about three miles west of the I-40/I-17 interchange. Eastbound I-40 will be reduced to one lane and traffic shifted to the north side of the roadway beginning at 6 p.m. Friday. A similar shift will occur on Friday, July 29th for the westbound lanes. In addition, there will be a 15-foot vehicle width limit in place and the speed limit will be reduced to 55 miles-per-hour. These restrictions will be in place through mid-Fall this year. Ongoing restrictions at this location include the closure of the on- and off-ramps as well as the crossroad under the bridge. Work is scheduled to be completed in fall 2022.