Dynamic traffic noise maps based on noise monitoring and traffic speed data. (May 2021)

• Record Type: Journal Article
• Authors: Lan, Ziqin; Cai, Ming
• Is Part Of: Transportation research. Volume 94(2021)
• Publication Date: 2021-05
• Subjects: Traffic noise map -- Dynamic update -- Traffic speed data -- Noise monitoring data -- Large region; Transportation -- Research -- Periodicals; Transportation -- Environmental aspects -- Periodicals; 354.76
• DOI: 10.1016/j.trd.2021.102796
• Languages: English
• ISSNs: 1361-9209

Abstract

Highlights: A method of dynamic traffic noise map based on traffic speeds is proposed. A linear model of the noise level and the traffic speed is developed. The calculation method is flexible and expandable. The proposed method is suitable for the situations of large urban regions. The factors affecting the accuracy of noise map dynamic update are analyzed. Abstract: Unlike the current methods for dynamic traffic noise maps by using traffic flow as the non-acoustic road-related parameter to predict the noise emission of the whole road network, this study proposes a new method for dynamic updates of traffic noise maps in large regions based on noise monitoring and traffic speed data. The proposed method consists of two main parts. First, since the traffic speed is one of the factors affecting the traffic noise, a model of the noise level and traffic speed is proposed to update dynamically the noise source intensity of the whole road network with the real-time noise monitoring data. Second, to avoid redundant computations, the acoustic attenuation terms are calculated in advance and combined with the updated noise source intensity to generate new noise maps. Compared with two other methods, the proposed method has higher accuracy with a 1.65-dB overall error.