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Super Loop La Jolla: Two Phase At-Grade Enhanced Intersection "2pi" System created by: Belisario Hernandez Romo P.E., Ph.D. P.T.O.E., Mettracorp Ph. 858-3668128. All directional traffic movements plus pedestrian crossings are negotiated at the intersection in two phases per semaphore controlled cycle. Capacity is increased at least 200%