A Hierarchical-Decentralized Traffic Light Control System. The First Realization: “Progetto Torino”

The real-time urban traffic control system CRONOS: Algorithm and experiments

“…Other systems break further away from the notion of time plan and cycle duration: OPAC in the USA (Gartner, 1982), PRODYN in France (Henry et al, 1983) and UTOPIA in Italy (Donati et al, 1984). These systems minimize a traffic criterion using an optimization method to determine the green and red stage durations by time steps of 4 or 5 seconds.…”

Using Automated Planning for Traffic Signals Control

“…Traffic-responsive control techniques are probably among the most used and studied methods for adaptive traffic signal control [2,3,4]. There are two main alternatives: centralized approaches, as SCOOT [5]; and distributed approaches, as UTOPIA [6]. In these classical approaches, in case new sensors/actuators are incorporated into the control system, or new metrics (or their combinations) have to be considered, the control programs have to be carefully modified to account for the new components, requiring a big engineering effort.…”

Do new sources of traffic data make the application of Chaos Theory to traffic management a realistic possibility?

“…Current systems include SCOOT (Bourner, 1984), Sydney Co-ordinated Adaptive Traffic System (SCATS) (Lowrie, 1982), Urban Traffic Optimisation by Integrated Automation (UTOPIA) (Donati, Mauro, Roncolini, & Vallauri, 1984), Real Time Hierarchical Optimised Distributed and effective System (RHODES) (Mirchandani & Head, 2001), Programming Dynamic (PRODYN) (Farges, Khoudour, & Lesort, 1990) and Method for the Optimization of Traffic signals In On-line controlled Networks (MOTION) (Busch, 1996). These systems make use of detectors that monitor traffic flows continuously across the network in real time and adjust the green splits, offsets and cycle times to optimise their operations and reduce delays (Hamilton et al, 2012).…”