The "B-B Wheel Arrangement" refers to a specific configuration of wheels on a locomotive or rail vehicle. In this arrangement, there are two axles, each equipped with two wheels, resulting in a total of four wheels. The designation "B-B" indicates that both axles are powered, providing better traction and stability on the tracks. This wheel arrangement is commonly used in diesel and electric locomotives, as it allows for a compact design while maintaining effective power distribution. The B-B Wheel Arrangement is particularly advantageous for urban transit systems and freight services, where maneuverability and efficiency are essential.