The controversial 2006 lease of the Indiana Toll Road paved the way for highway projects funded by public-private partnerships in Indiana — including the relatively smooth and nearly finished building of a bridge over the Ohio River at Louisville and the beleaguered construction of a 21-mile stretch of Interstate 69 from Bloomington to Martinsville. Indiana’s next governor — whose road-funding agenda will likely shape discussions at next year’s budget session of the Indiana General Assembly — will have a major role in crafting future deals to fund projects and maintain the state’s infrastructure. The question is whether the state will...