North Carolina officials are trying to figure out how to unwind parts or all of a 2014 public-private partnership that is building managed toll lanes on a Charlotte-area highway.Ever since the ink dried on North Carolina’s first transportation P3 contract, the plan to relieve severe congestion in the Charlotte region has generated controversy.Public opposition remains just as fierce today to the project that will add express lanes on Interstate 77, even though more than one report says the deal with I-77 Mobility Partners LLC, a consortium led by Cintra Infraestructuras S.A., was properly authorized and permitted.The 26-mile-long project is designed...