IIHS stands for Insurance Institute for Highway Safety. According to IIHS research reports, half of serious car accidents occur at night, and a quarter of them occur on unlit roads. Poor night visibility, fatigue driving and other factors are all causes of accidents. If the headlights cannot provide good lighting, the probability of accidents will increase.
IIHS lighting includes the following aspects:
1. Night lighting, which evaluates the lighting effect of vehicle headlights under different road conditions, including the brightness and coverage of high and low beam lighting. The test also includes the lighting effect of the vehicle at different speeds, as well as its performance under various road curvatures and ups and downs.
2. Brake lights, which evaluate the brightness and reaction speed of the vehicle's brake lights to ensure that other drivers can notice and respond in time in emergency braking situations.
3. Curve lighting, which evaluates whether the vehicle is equipped with an effective curve lighting system to improve visibility of road edges and obstacles when driving at night.
4. Automatic high and low beam switching system, evaluates whether the vehicle is equipped with a system that automatically switches between high and low beams, and tests its effect when driving at night. Different from the national standard, the static tests of China's CNCAP and Europe's ENCAP, after the headlights that meet the standards are installed on the whole vehicle, will cause deviations in lighting effects due to factors such as installation position and dimming accuracy.
In actual use, the vehicle is in motion. Due to the influence of the road surface, weather, and vehicle posture, the real lighting effect of the headlights is difficult to be well reflected. IIHS believes that in order to improve road traffic safety and promote corporate technological progress, it is necessary to conduct more objective and real tests and evaluations on the overall performance of headlights on top of the existing regulatory standards. Therefore, the Insurance Institute for Highway Safety (IIHS) of the United States issued the evaluation procedures for automobile headlights in August 2015. The difference is that IIHS uses a dynamic test method. In order to eliminate the influence of vehicle suspension differences and ensure the repeatability of test results in different environments, different locations and other facilities, this method processes and corrects the data deviation caused by changes in vehicle pitch angles during post-processing. From 2016 to date, IIHS has completed the evaluation of dozens of models. Judging from the test results, the rate of excellence has increased year by year, indicating that the evaluation mechanism has played a positive role in improving the performance of automobile headlights.