This project focuses on the design and construction of a vehicle speed detection system using infrared (IR) sensors and an Arduino-based microcontroller (Atmega328). The system aims to enhance road safety by monitoring and reporting vehicle speeds on highways, particularly in areas prone to accidents due to over-speeding. With the increasing rate of road traffic accidents caused by reckless driving, especially on highways, this system serves as a preventive measure by alerting drivers when they exceed the designated speed limit.