Road transportation is one of the most important modes of transport used for carrying passengers and goods from one place to another. With the rapid growth of industries and commercial activities, the usage of heavy vehicles such as trucks, buses, and lorries has increased significantly. In many cases, vehicles are overloaded beyond their permissible weight limit to transport more goods in a single trip. Vehicle overloading is a major cause of road accidents, vehicle instability, tire damage, brake failure, and road deterioration. 

Excessive load affects the performance and safety of the vehicle, thereby increasing the possibility of accidents and loss of human life. Traditional overload detection methods mainly include manual inspection and weighbridge systems. Manual inspection requires transport authorities to stop vehicles at checkpoints and verify the load, which is time-consuming and prone to human error. Weighbridge systems provide accurate weight measurement, but they require expensive infrastructure, large installation areas, and may cause traffic congestion. Advanced systems such as Weigh-In-Motion (WIM) and IoT-based monitoring systems offer automation and real-time monitoring, but they are costly and difficult to implement in low-budget applications. To overcome these problems, an Arduino-based vehicle overload detection system is proposed. The system uses load cell sensors to measure the vehicle load and an HX711 amplifier module to process the sensor signals. The Arduino controller continuously monitors the load value and compares it with a predefined safe limit. 

If the load exceeds the limit, warning indicators such as LEDs and a buzzer are activated to alert the driver immediately. The proposed system is simple, low-cost, reliable, and easy to implement. It helps in preventing accidents caused by overloading and improves overall vehicle safety. The system can also be upgraded with technologies such as GSM, GPS, and IoT for remote monitoring and smart transportation applications. Due to its efficiency and affordability, this project is suitable for both educational and practical applications.

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