DUNMORE – Interstate 81 south will be restricted to one lane for road work today. The restriction will begin at approximately 8:30 a.m., and will be between Exit 159 (Nuangola) and Exit 155 (Dorrance). Crews will be working to complete repairs to a concrete slab. Moderate delays are anticipated in the area. PennDOT officials expect the lane to reopen at 3 p.m. today.