As Complaints Pile Up, North Carolina Rethinks Public-Private Road Project

CORNELIUS, N. C.—When North Carolina brought in a private operator to add toll lanes to a 26-mile stretch of highway north of Charlotte, its goal was to reduce congestion and build a road the state couldn’t otherwise afford.

The hope was that the state’s first public-private partnership for roads would be a model of efficiency and the first of many such projects. But the expansion of Interstate 77 has hit speed bumps, with travel…