Whats an SIU?
Because the I-69 highway is so long, it cannot be constructed as a single project. Instead, it is being developed in a series of sections called Sections of Independent Utility, or SIUs. Also, needed improvements vary along the route. Some sections require widening, reconstruction, or relocation of existing roadways, while other sections require development of an entirely new highway in a new location. All Sections or SIUs must be functional on their own – even if the adjacent section(s) or none are built.
