A comprehensive review of noise pollution monitoring studies at bus transit terminals

Abstract

This article systematically reviews research on noise pollution monitoring conducted over the past 23 years at various bus transit terminals located worldwide. About 18 articles were identified using PRISMA method and were evaluated to provide summary of prior research work to examine accuracy, authenticity, and reliability of noise monitoring results with respect to chosen methodology and extent of noise pollution at bus transit terminals. It examines important indicators of noise pollution and the analysis parameters such as noise sampling, noise descriptors, processing of acquired data, noise mapping, etc., and compares it with the regulations and standard guidelines notably ISO 1996-2:2017 and American National Standards Institute/ASA S12.18-1994 (R2009) and their prior versions aiming to identify research gaps. The studies have primarily focused on noise monitoring, revealing widespread excessive noise pollution exceeding permissible levels at bus terminals globally. This article underscores significant research deficiencies in noise pollution monitoring at bus terminals, emphasizing the challenge of conducting quantitative meta-analyses and statistical comparisons due to variations in parameters and qualities. Noise pollution standards are breached in all terminals covered in the identified literature; hence, noise mitigation measures must be implemented at these bus terminals. The study suggests that noise monitoring must be carefully devised with respect to individual site operations and noise sources and in compliance with standard guidelines to improve the accuracy of the results. There is a need for uniform guidelines that can be followed globally for environmental noise monitoring as there are only a few countries that have guidelines for noise monitoring. The outcomes of this research will be helpful in guiding noise monitoring, mapping, and mitigation strategies as well as designing transit terminals to improve overall acoustical ambiance for more passenger footfall for sustainable transportation.