(Hillsboro, OR) -- Highway 26 will close in both directions Tuesday and Wednesday nights near the Brookwood Parkway overpass in Hillsboro. The closure will happen between midnight and 5 a.m. for installation of the Bridge of Land & Sky. The chain link fencing on the overpass is being replaced with an artistically designed metal wall. It was designed by artist Cliff Garten. The 7- to 9-foot-tall undulating ribbon is 290 feet long on each side of the overpass. During the closure, freeway traffic will be detoured using the on- and off-ramps for the freeway, so there could be delays.