TSR (Traffic Sign Recognition), or Traffic Sign Recognition System, is a driving assistance function that detects road speed limit signs through the fusion of forward-looking camera and navigation data. The system can recognize speed limit signs ahead in real time and display the speed limit value on the instrument panel. Most vehicle models have this function enabled by default, while some support manual activation/deactivation via the central control screen and can retain the last setting state. Its core technology relies on image recognition algorithms capable of processing common signs including standard speed limit signs and lane-specific speed limit signs, but has certain limitations: potential failure may occur due to camera obstruction, strong light interference, sign damage, or outdated navigation data. Note that TSR serves solely as an auxiliary tool and cannot adapt to temporary road condition changes such as construction detours. Drivers must always comply with actual road signs. Currently, the TSR function in mainstream vehicle models has been integrated into ADAS systems, operating in coordination with features like adaptive cruise control. However, speeding alert thresholds (typically set at 5-10 km/h above the speed limit) may vary across brands. Particularly in complex road conditions or inclement weather, drivers should proactively observe road signs.
