Interregional Corridor System
The IRC system has been retired and is no longer used to measure performance or as an investment category. Through federal legislation, the National Highway System was expanded and performance measures for mobility on the NHS have been developed. The NHS is now the priority network for mobility investment in the 20-year Minnesota State Highway Investment Plan. The plan has identified a small amount of investment to address travel time reliability issues at priority locations on the NHS in Greater Minnesota. Performance measures and targets on the NHS have yet to be developed but will follow federal requirements. For more information on how the NHS is used in MnDOT’s investment planning, refer to the 20-year State Highway Investment Plan. For NHS performance information, refer to the current Annual Transportation Performance Report.