 These restrictions will be in place between 6 p.m. and around 7 a.m., and it will be all week through Saturday. The restrictions are needed to accommodate earthwork and the placement of temporary concrete barriers as part of the I-17 improvement project. If you're driving through the area, don't forget the speed limit is reduced to 65 miles an hour through the entire construction zone, and you need to watch out for construction personnel and equipment.