日间交通 meaning in Chinese

daytime traffic

1 noise : the greatest volume of noise normally occurs on straight sections when trains pass at their highest speed . whereas noise from mrt trains is masked by the background noise of heavy daytime traffic , at nighttime the level of noise is significantly more obvious
（ 1 ）噪音部分：捷运直线高速行驶路段之噪音最高，因日间交通量大，道路交通噪音亦大，故捷运音量较不明显，于夜间捷运车辆行驶之噪音则较明显。