An Effective Combination of PLC and Microcontrollers for Centralized Traffic Control and Monitoring System

Burhan Ahmed,Irfan Ullah,Qasim Shehzad,Hafiz Muhammad Tayyab,Nabeel Zahoor

doi:10.3390/engproc2021012071

Burhan Ahmed, Irfan Ullah + Show 3 more

Open Access

https://doi.org/10.3390/engproc2021012071

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Abstract

In this paper, a smart and centralized traffic light control and monitoring system is proposed to control the modern transportation systems and make the city safer, using programmable logic controllers (PLCs) and programmable electronic microcontrollers. A camera is used to monitor the mishaps during the traffic flow of vehicles. The system has four modes, i.e., auto-control mode (ACM), manual control mode (MCM), central control mode (CCM), and remote control mode (RCM). In the auto-control mode (ACM), the traffic light signals are controlled automatically through programmable electronic microcontrollers at specific times, while the manual control mode (MCM) controls the traffic light signals manually (on–off switches) according to the traffic congestion. The central control mode (CCM) is considered to be a centralized mode, where the programmable logic controller (PLC) is used by a computer workstation. In this mode, the traffic light signals are controlled by a ladder logic program of the PLC. The third mode, RCM, is linked with the second mode, CCM; in this mode, the traffic light signals are remotely controlled through the software by transferring programmable logic controller (PLC) functions to the software interface. As a result, this transportation system can also be controlled remotely. The designed system delivers suitable, flexible, and reliable control for traffic signaling and transportation.

Highlights

In today’s era, controlling traffic is always an issue in highly populated countries; in some countries, a traffic warden system has been established, while others follow the automatic light controlling system
The microcontroller played an effective role in designing the traffic control system
The inputs of the programmable logic controllers (PLCs) ar described as push button A and B, and these inputs are attached to the main input section

Summary

Introduction

In today’s era, controlling traffic is always an issue in highly populated countries; in some countries, a traffic warden system has been established, while others follow the automatic light controlling system. In this modern world, a smart transportation system is required to effectively control traffic light signals [1,2]. The microcontroller played an effective role in designing the traffic control system. It is a compact device, or a tiny computer, based on an electronic chip that has a CPU, RAM, ROM, timers, and I/O ports.

Internal Structure of PLC

Conclusions