1. Heavy traffic: Mianyang Olympic Spring Phase II is located on Kyushu Avenue with heavy traffic. Vehicles coming and going include many large trucks and buses at Zhengping Station, most of which are large cars with loud engines.
2. Fast speed: The section where Olin Spring Phase II is located is basically the section with the steepest slope of Jiuzhou Avenue, about 700 meters away from the last traffic light, and the passing vehicles basically rush down from the last traffic light at high speed, which increases the noise.