IJSTE - International Journal of Science Technology & Engineering | Volume 4 | Issue 10 | April 2018 ISSN (online): 2349-784X All rights reserved by www.ijste.org 96 Smart Traffic Light System Gurudatta Verma Rishabh Sonkar Department of Computer Science & Engineering Department of Computer Science & Engineering Shri Shankaracharya Institute of Professional Management and Technology, Raipur, Chhattisgarh, India Shri Shankaracharya Institute of Professional Management and Technology, Raipur, Chhattisgarh, India Lekhraj Bowaria Department of Computer Science & Engineering Shri Shankaracharya Institute of Professional Management and Technology, Raipur, Chhattisgarh, India Abstract In our day-to-day life, we have seeing conventional traffic light system controlling the flow of automobiles at many junctions of roads. In conventional traffic light systems each road at junction gets predefined green light time, hence it is not able to handle variable flows approaching the junctions, due to which we have to deal with traffic jams and congestion on the road. To deal with this problem and to provide smooth motion of vehicles in the transportation routes we proposed this paper in which we are going to discuss, how can we solve above stated problem by implementation of Internet of Things (IoT). Keywords: IoT, FSR ________________________________________________________________________________________________________ I. INTRODUCTION Smart traffic light system is a system, which uses Internet of Things (IoT) [1] to provide smooth motion of vehicles in the transportation routes. IoT: The Internet of things (IoT)[1] is the network of physical devices, vehicles, home appliances and other items embedded with electronics, software, sensors, actuators, and connectivity which enables these objects to connect and exchange data. Each thing is uniquely identifiable through its embedded computing system but is able to inter-operate within the existing Internet infrastructure. Smart city is a powerful application of IoT generating curiosity among world's population. Smart surveillance, automated transportation, smarter energy management systems, water distribution, urban security, environmental monitoring and smart traffic light system all are examples of internet of things (IoT)[1] applications for smart cities. Conventional Traffic Light: In conventional traffic light systems each road at junction gets predefined green light time, hence it is not able to handle variable flows approaching the junctions, due to which we have to deal with traffic jams and congestion on the road. Smart Traffic Light: In smart traffic light system, we propose the idea to use IoT to provide smooth motion of vehicle in transportation routes and to reduce the waiting time at the junction at each side of road by skipping unnecessary greenlight time to road when there is no traffic on it. For the same, smart traffic light uses FSR [3] sensor to detect vehicle on the road and provide greenlight to only the road with vehicle on it. As soon as the vehicles leaves the road or we can say that there is no traffic on the road then green light time is passes to next lane or traffic signal get converted to red signal. Force Sensitive Resistor (FSR) Sensor: FSRs are sensors that allow you to detect physical pressure, squeezing and weight according to this they changes resistive value (in ohms Ω) depending on how much it is pressed. These sensors are fairly low cost, and easy to use. The FSR [3] is made of two layers separated by a spacer. The more it get pressed, the more of those Active Element dots touches the semiconductor and that makes the resistance go down as shown in graph in figure 1. Hence, it is best choice to detect presence of vehicles on the road.