ATC4000 Intelligent Self-Adaptive Traffic Signal Control System

Background

ATC4000 Intelligent Self-Adaptive Traffic Signal Control System is used to make traffic light controllers more intelligent. Traffic in a city is very much affected by traffic light controllers. When waiting for a traffic light, the driver loses time and the car uses fuel. Intelligent traffic light control does not only mean that traffic lights are set in order to minimize waiting times of road users, but also that road users receive information about how to drive through a city in order to minimize their waiting times.

ATC4000 is a microprocessor controller that adopts the embedded hardware and CAN bus structure, is stable and reliable, and is easy to expand. It has the largest 48-way lamp driving output, and has many intelligent control functions such as single-point induction, single-point optimization, cable-free green wave drive-by-wire, pedestrian request button, tactical changes and othersaccording to all CE standards, in particular it complies the requirements of EN:50293:2012, EN 50556:2011, EN61010-1:2010, EN61326-1:2013, BS EN 12675-2001.

Self-Adaptive Traffic Signal Control System Description

As shown below, the Self-Adaptive Traffic Signal Control System consists of control hardware, management and control software systems, communication systems, system configuration and management database.

Self-Adaptive Traffic Signal Control System 01

The system applies a three-level control structure, namely junction control level, regional control level and center control level, which can be flexibly cut according to the scale of system control. Control functions at all levels are as follows. The control structure is shown below:

Self-Adaptive Traffic Signal Control System 02
Self-Adaptive Traffic Signal Control System Requirements

The system is consisted by traffic flow detector, self-adaptive controller and traffic lights.

Self-Adaptive Traffic Signal Control System 03
Self-Adaptive Traffic Signal Control System 04
Self-Adaptive Traffic Signal Control System Features

Deep learning computing at the back-end permits self-adaptive traffic light control

The Self-Adaptive Traffic Signal Control system uses a real-time traffic adaptive approach to urban traffic control by measuring current traffic conditions and then adjusting Cycle Lengths, Splits and Offsets. Its real-time response to changing traffic conditions ensures the most appropriate traffic signal phasing to safely direct traffic through intersections. Using in-road and/or above road sensors, and by sending instructions to traffic signal controllers to manage signal timings, automatically maximizes traffic throughput, minimizes delays and minimizes the number of stops.

For traffic administrators, congestion information, images on CCTV monitor, creation of statistic data from vehicle detectors and simulation function according to the statistic data etc. are available. The system does not require operator intervention for its day-to-day operation. At a typical Traffic Management Centre, operations staff are responsible for monitoring the overall system. They observe traffic flow and under exceptional circumstances can manually override traffic signal operation.

By using state-of-art control algorithm, the controller can be used for various applications i.e. large and complex as well as traffic congestion intersections.

The Self-Adaptive Traffic Signal Control system is applicable with various power supplies used in the world. AC 85 – 264V, 50/60 Hz

The controller is designed for high temperature durability as well as for low energy consumption.

The information board (also called variable message sign dynamic message sign or VMS) can be added to display congestion information or route guidance information.

The basic control parameters such as step time, control pattern, offset time can be updated and referred to on the control panel.

Furthermore, by connecting to PC with the exclusive console software, all the parameters can be updated and referred under easy-operational human-machine interface environment.

Controller main functions

Flashing
All red
Manual with remote control
Automatic with fixed times
Synchronized – Linked or internal timer
GPS Timing function
Actuated by the traffic flow with extension and/or cancellation of traffic phases
Light off features
Red-green conflict warning
Bus priority
Automatic change between summer time/daylight time
Pedestrian push button
Centralization with dynamic plan selection or phase progress

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