A Coordinated ramp metering algorithm for Minnesota's freeways based on density. - Nikolas Geroliminis; Anupam Srivastava; Panos Michalopoulos (ITSC, 2010)

A Dynamic-Zone-Based Coordinated Ramp-Metering Algorithm With Queue Constraints for Minnesota's Freeways. - Nikolas Geroliminis; Anupam Srivastava; Panos Michalopoulos (IEEE Trans. Intell. Transp. Syst., 2011)