A traffic flow controller for nonstationary velocity profiles on automated highways

In this paper a traffic flow controller designed under the automated highway system (AHS) hierarchical control structure proposed in the California PATH program is introduced. The controller´s purpose is to sustain nonstationary velocity profiles on fully automated highways. Traffic flow modeling and controller stability are discussed. The usefulness of nonstationary velocity profiles in creating a moving area of low vehicle density is stressed. Results obtained using SmartCap, a traffic flow simulation program, demonstrate application of the controller to the fast circulation of an emergency vehicle in AHS while high traffic flow is maintained