Laboratory Based Automatic Traffic Light Control System by Using (PLC) Programmable Logic Controller

Mohsin Ali Koondhar, Masood Ali Koondhar, Ali Asif Malak


This research is focused on laboratory based analysis on hardware module of traffic light with software. There are four ways of a traffic light in hardware model for detection of vehicle; each way has one sensor button. Three LEDs with individual colors say red, yellow and green for represents the traffic light in each lane.  Sensor and LEDs are connected to Mitsubishi PLC and each part on hardware controlled by PLC. Ladder diagrams are programmed by software to monitor the system and help improve public transportation services, thereby improving traffic guidance and traffic light control. The system was developed by setting the appropriate time for the traffic lights to respond accordingly. Critical timing operations should be performed during heavy traffic. The system used in traffic control systems must contain low power consumption, low engineering costs and increased safety. The controller then checks the priority and then provides an exit signal to the traffic light post to turn the red, yellow or green lights on or off, and the running time depends on the specific priority. Finally, the signal lights were successfully controlled by the PLC.


PLC, traffic lights, ladder programming, sensor, PLC Interface Board

Full Text:



L. Yang, and C. XianFeng, (2009), Design of Traffic Lights Controlling System Based on PLC and Configuration Technology. International Conference on Multimedia Information Networking and Security IEEE, vol. 2, pp. 561-563.

X. Keming, L. Daliang, and X, Jun, “A fuzzy logic based traffic light control system”, 10th Int. Symp. on Inte. Circ., Dev. and Sys, ISIC-2004: Integrated Systems on Silicon - Proceedings, Suntec, Singapore, 2004, pp. 341-344.

A. Maman, S. Goldschlager, and H. Miller, “Reusable on-chip system level verification for simulation emulation and silicon,” 11th Annual IEEE International High-Level Design Validation and Test Workshop, pp. 119-126, 2006.

M. D. Srivastava, S. S. Prerna, S. Sharma, U. Tyagi, “Smart Traffic Control System Using PLC and SCADA,” International Journal of Innovative Research in Science, Engineering and Technology, vol. 1, no. 2, pp. 169-172, 2012.

S. Amir, M. S. Kamal, S. S. Khan, K. M. A. Salam. (2017), PLC Based Traffic Control System with Emergency Vehicle Detection and Management. International Conference on Intelligent Computing, Instrumentation and Control Technologies, IEEE, pp. 1467-1472.

N. H. Kham, and C. M. Nwe, “Implementation of Modern Traffic Light Control System,” International Journal of Scientific and Research Publications, pp. 1-6, 2014.

N. M. Z. Hashim, A. S. Jaafar, N. A. Ali, L. Salahuddin, N. R. Mohamad, and M. A. Ibrahim, “Traffic Light Control System for Emergency Vehicles Using Radio Frequency,” IOSR Journal of Engineering, vol. 3,no. 7, pp. 43–52, 2013.

H. Wang, J. Lu, W. Li, and Z. Jiang (2017) Development of three dimensional virtual PLC experiment model based on Unity3D. First International Conference on Electronics Instrumentation & Information Systems (EIIS), IEEE, pp. 1-4.

Q. Yuan, X. M. Liu, and X. L. Yi, “Research and Practice on the teaching reform of PLC application technology,” Education and Teaching Forum, no. 4, pp. 122-124, 2015.

S. V. Viraktamath, P. Holkar, P. V. Narayankar, J. Pujari, “Adaptive Intelligent Traffic Control System using PLC,” International Journal of Innovative Research in Computer and Communication Engineering, vol. 3, no. 1, pp. 287-290, 2015.

M. A. Koondhar, A. K. Junejo, A. S. Saand, and M. U. Keerio, “Speed Control of DC Series Motor with Conventional and PLC Techniques,” International Journal of Information Technology and Electrical Engineering, vol. 5, no. 4, pp. 21-26, 2016.

Mitsubishi Fx Programmable Logic Controllers, 2nd Ed. Applications and Programming Feedback Company UK (Lab Manual).


Creative Commons License
Journal of Applied and Emerging Sciences by BUITEMS is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at
Permissions beyond the scope of this license may be available at

Contacts | Feedback
© 2002-2014 BUITEMS