Junction by Micah Frank is a sound sculpture generated by thousands of New York City taxi cabs as they move through the city. Through the use of publicly available live footage from New York’s Traffic Management Center, Junction tracks the movements of taxis in some of the city’s busiest intersections. It uses their position, velocity and overall density to synthesize sounds… A taxi’s position might control only one partial of a complex frequency spectrum, or a single frame of a granular cloud. Up to 40 taxis are tracked on the grid simultaneously. They are indexed and vectored every 50 milliseconds. Once a taxi leaves the scene, its index dies and a new taxi is tracked.