In these countries, environmental noise simulation software, such as ‘‘Cadna/A’’, ‘‘Soundplan’’ and ‘‘Lima’’, are primarily used. Usually, the Calculation of Road Traffic Noise from the UK (CRTN) and the Richtlinien für den Lärmschutzan Strassen (RLS90) traffic noise evaluation/estimation models are used in these software. However, these models are not suitable for road traffic conditions and urban environments in China, because Chinese noise emission models, vehicle classifications, noise evaluation indicators, etc. are significantly different from their European counter parts. Therefore, China developed its own evaluation models [12] in 2001. Some Chinese cities have developed their own noise maps. For example, Hong Kong developed a noise map based on 3D visualization technology [13]; Tainan created a diurnal traffic noise map using noise monitoring data [14]; Beijing drew its first traffic noise map of 12.7 km2 [15]; and Guangzhou created a traffic noise map of the Inner Ring Road [16]. Despite these efforts, there are a limited number of studies on traffic noise maps on the scale of an entire city. The scarcity of these studies may be attributed to the absence of city-scale traffic information and the difficulty associated with the secondary development of the aforementioned software.