This document reviews vehicle detection and tracking systems using IoT technologies like Raspberry Pi. It discusses how previous studies have used GPS, GSM, and other sensors to track vehicle location in real-time and identify issues with those approaches. The document proposes a new vehicle tracking system that uses Raspberry Pi connected to a 3G/4G USB dongle to obtain location data and send it to the cloud for representation on a map. This provides real-time tracking while aiming to reduce costs and power consumption compared to other methods.