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. A simple longitudinal controller is then introduced, employing a PID-based slip control mechanism that adjusts torque to regulate wheel slip.