Night time noise indicator for major roads

This layer shows the night time noise indicator levels which represent the noise indicator for sleep disturbance in major roads as defined for Malta according to the requirements of Directive 2002/49/EC relating to the assessment and management of environmental noise.本图层展示夜间噪声指示等级，该等级系依据《关于环境噪声评估与管理的欧盟指令（2002/49/EC）》的相关要求，为马耳他制定的、用于表征主要道路睡眠干扰的噪声指标。