Abstract With the increasing adoption of electric vehicles (EVs), in-wheel motor configurations have gained significant attention due to their potential for improved efficiency and controllability. This thesis focuses on the longitudinal dynamics of an in-wheel motor electric vehicle, where a comprehensive simulation model is developed to analyze vehicle behavior under different road conditions, such as bumps and slippery surfaces. The developed model consists of a motor torque source, a road profile generator, and a quarter-car model that considers both longitudinal and vertical dynamics, through enveloping tire model. The system is first simulated without active control to establish baseline performance. Asimple longitudinal controller is then introduced, employing a PID-based slip control mechanism that adjusts torque to regulate wheel slip.