Roll stability refers to a vehicle's ability to resist tipping over during turns or when encountering uneven surfaces. It is influenced by factors such as the vehicle's center of gravity, width, and suspension design. A lower center of gravity generally enhances roll stability, making the vehicle less likely to roll over. In the context of automobiles, trucks, and buses, roll stability is crucial for safety. Manufacturers often implement features like electronic stability control systems to help maintain balance and prevent rollovers. Understanding roll stability is essential for both vehicle design and safe driving practices.