Smart Speed Monitoring System For Road Safety

The Smart Speed Monitoring System uses an Arduino Uno R3 as the central processing unit to calculate the speed of a passing vehicle in real-time. The system relies on two IR sensors placed at a fixed, known distance apart along the path of travel. As a vehicle passes the first IR sensor, its infrared beam is interrupted, triggering an internal timer in the Arduino code. When the vehicle reaches the second IR sensor and interrupts its beam, the timer stops. Because the distance between the two sensors is constant, the Arduino calculates the speed by dividing that distance by the elapsed time. The calculated speed value is then continuously transmitted to a 16x2 LCD display, which is adjusted for optimal screen contrast using a 1k potentiometer. If the calculated speed surpasses a pre-programmed threshold limit, the Arduino immediately sends an output signal to activate a buzzer, providing an audible alert that a speed violation has occurred. Jumper wires connect all these individual modules to the appropriate digital, analog, and power pins on the Arduino Uno board.