Speed regimes refer to the different categories of speed at which vehicles or objects operate. These regimes can be classified into various levels, such as low speed, moderate speed, and high speed. Each category has specific characteristics and applications, influencing factors like safety, fuel efficiency, and performance. In transportation, speed regimes are crucial for understanding how vehicles like cars, trains, and airplanes perform under different conditions. For instance, urban areas often have low-speed regimes to ensure safety, while highways accommodate higher speeds for efficient travel. Understanding these regimes helps in planning and optimizing transportation systems.