Construction to repair a buckled highway in northern Arizona could start this summer. A 150-foot section of pavement on U-S Highway 89 south of Page buckled in a landslide a year ago. The state Department of Transportation says a 25-million-dollar project to move the roadway about 60 feet and construct a downslope buttress to stabilize the area could be complete by the end of the year. That is if the department does not encounter hurdles in environmental reviews or right-of-way clearances. The department submitted the final environmental documents to the Federal Highway Administration for review this week. Motorists have been using an alternative roadway, labeled U-S 89-T, between The Gap and Page since August 2013. But transportation officials say travel between Bitter Springs and Page continues to be a hardship.