Carolina Osorio improves traffic light timing to speed urban traffic
Drivers frustrated by red lights at each intersection can take heart that Professor Carolina Osorio and graduate student Linsen Chong have developed a better way to compute optimal timing of city stoplights. Osorio is the lead author of a forthcoming paper in the journal Transportation Science that describes the new system, based on a study of traffic in Lausanne, Switzerland. The new optimization process uses high-resolution traffic simulators that provide detailed descriptions of how 12,000 simulated drivers respond to changes in travel conditions, rather than treating them as a simple homogeneous group. This method showed that better timing could reduce average travel time by 22 percent, compared with results from commercial traffic-light timing software. Read this MIT News story.