ITS Infrastructure
- Products and Services
- ITS Infrastructure
- Traffic Control System
Control/regulating system
Optimizing road traffic through integrated control by analyzing and utilizing the gathered data
Traffic Control System
A traffic control system realizes safe and smooth road traffic flow. Based on the analysis and simulation results of the traffic information gathered by various detectors installed along roads, the system, for example, controls traffic signals and provides traffic information via various media to realize the traffic management optimal for cities and the environment. We provide a wide range of products, from various detectors to traffic signal control systems, central systems, and transmission systems between central systems and terminals, thus we have a proven track record in major cities across the country, including, notably, the world’s largest class Tokyo Metropolitan Police Department Traffic Control Center.
Traffic signal control algorithm
MODERATO-S
Optimal signal control is realized with the collaboration of “macro control,” which controls the overall urban road network using the central systems of traffic control centers, and “micro control,” which controls traffic fluctuations at each intersection using the traffic signal controller.
Demand prediction control
Traffic flow fluctuations from current to a few minutes later are predicted based on the traffic information at upstream to realize traffic signal control with no delay in control.
Utilization of probe data (trajectory data) for traffic signal control
Based on the probe data obtained from advanced infrared beacons, spatially wide traffic information, which could not be obtained by conventional vehicle detectors, can be calculated to realize more advanced traffic signal control.
Advanced Mobile Information Systems (AMIS)、
Driving Safety Support Systems (DSSS)、
Public Transportation Priority Systems (PTPS)
、
Fast Emergency Vehicle Preemption Systems (FAST)、
Traffic Signal Prediction Systems (TSPS)
Advanced Mobile Information Systems (AMIS)
This system generates traffic congestion, travel time, and other information based on the information gathered by the traffic control center and provides general drivers with such information via VICS (Vehicle Information and Communication System) as well as other media such as traffic information boards and traffic information car radios.
Driving Safety Support Systems (DSSS)
This system transmits traffic events, which are not directly visible to the driver or which the driver may fail to detect, via roadside units such as ITS wireless roadside units to the in-vehicle unit and provides the driver with such information as necessary in order to reduce traffic accidents.
■Signal recognition enhancement system
■Rear-end collision prevention support system
■ Right/left-turn collision prevention system, etc.
[ITS wireless communications system]
This is a wireless communications system for ITS applications using the frequency band (760 MHz band) now available after digital terrestrial television broadcasting was introduced.
This allows continuous communications in a wider zone suitable for road-to-vehicle cooperation systems.
Public Transportation Priority Systems (PTPS)
This system detects buses using the infrared beacon installed before the intersection and controls traffic signals such as green extension or red shortening for their priority passage. When traffic congestion occurs, our system ensures on-time travel and speeding up during rush hours by automatically operating priority control in the directions of forward travel to reduce traffic congestion.
Fast Emergency Vehicle Preemption Systems (FAST)
This system helps emergency vehicles to shorten time required to arrive on the scene. An infrared beacon detects emergency vehicles to control traffic signals to prioritize their driving. Our system, which controls six traffic signals with one infrared beacon, can extend or reduce the signal time depending on the types of vehicles or the time zones. In Tokyo and Okayama, for example, the time required for driving through intersections has been reduced by 14% on average.
Traffic Signal Prediction Systems (TSPS)
This system provides vehicles with information (signal phase & timing information along corridor) such as traffic signal timing using infrared beacons to help vehicles smoothly pass through intersections. This system aims at safe and smooth travel and CO2 emissions reduction by, for example, providing the optimal recommended speed to avoid stopping at a red light (passing support), providing deceleration instructions early when stopping at a red light is unavoidable (stopping support), and helping avoid delay in starting (support for turning off a vehicle engine when stopped).
