Car turn signals are not identical; their design, function, and configuration vary due to differences in vehicle models, technical standards, and brands. For basic functions, all turn signals are used to indicate the intention to turn or change lanes, using yellow light sources to ensure high visibility, and their flashing frequency generally follows the national standard of 60 to 80 flashes per minute. However, there are differences in specific implementation methods: traditional models mostly use xenon tubes, while modern models such as some luxury cars or new energy vehicles have popularized LED turn signals, which offer advantages of higher brightness, longer lifespan, and energy efficiency. For operation logic, most vehicles are controlled via the lever on the left side of the steering wheel following the "up for right, down for left" rule, but some brands (such as certain Japanese cars) may use the opposite design, and high-end models even feature sequential turn signals or automatic steering functions. Additionally, the base types of turn signals (such as P21W, PY21W) and installation positions (beside headlights, rear of the vehicle, side mirrors, etc.) also vary depending on the vehicle's positioning. Proper use of turn signals not only reduces accident risks but also constitutes a fundamental requirement for traffic regulation compliance.
