A traffic noise pollution model for an urban arterial: Case study of Tanke-University Road, Ilorin (Nigeria)

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NSE Technical Transactions


Traffic noise was investigated along an urban arterial for the purpose of developing a model for the management and control of traffic noise pollution on main corridors of movement in an urban setting. Noise levels were measured at morning and afternoon peak periods at major sections, (nodes and links), with respect to the prevailing traffic on Tanke Road, the main arterial linking the Ilorin Township to the University community. Regression analysis was performed on the traffic and noise data were generated at different times of the day. The traffic noise level on the Tanke – unilorin road in the units of sound equivalent, Leq are in the order of 73.5dB at all the sections of the road, which are higher than the World Health Organization (WHO) threshold but lower than the Nigerian’s Federal Environmental and Protection Agency (FEPA) standard of 90dB(A). The results imply that the noise pollution on the studied arterial is high and can adversely affect the welfare and daily activities of the residents and dwellers within the neighbourhood of an urban arterial. The regression analysis established a strong relationship between the average equivalent noise level (Leq) and Traffic described with a polynomial of order three and six with R2 values ranging from 0.73 to 0.98; and a relatively weaker relationship, with R2 of 0.13 to 0.92 for the traffic noise index (TNI) at all sections of the arterial.


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noise pollution, traffic noise equivalent, sound level, traffic noise index, urban arterial