Journal of Pharmaceutical Negative Results ¦ Volume 14 ¦ Issue 3 ¦ 2023 1 Abstract Noise Level Variation At A Construction Site Of Double- Decker Flyover And Its Physiological Consequences Khushbu Kumari 1 *, Bijay Kumar Das 2 , Avi Kush 3 , Anjali Pathak 4 , Arpita Srivastava 5, Supriya Kumari 6 1 *Independent researcher, Patna, India. Email: drkhushbukumari22@gmail.com 2 Associate Professor, Department of Architecture and Planning, NIT Patna. Email: bijay@nitp.ac.in 3 B. Tech (4 th Sem.) Civil Engineering, SMVDU, Katra, Jammu and Kashmir, India Email: avikush99@gmail.com 4 Assistant Professor, Department of Architecture and Planning, BIT Mesra, Ranchi. Email: ar.anjali.pathak@bitmesra.ac.in 5 M. Arch (4 th Sem) Department of Architecture and Planning, NIT Patna. Email: arpitas.pg21.ar@nitp.ac.in 6 Assistant Professor, SPA Bhopal. Email: supriya0458@gmail.com *Corresponding Author: - Khushbu Kumari *Independent researcher, Patna, India. Email: drkhushbukumari22@gmail.com The world is witnessing an unprecedented growth in urban population with huge pressure on infrastructure. Urban transportation is facing challenges of increased trips and thereby growth of vehicles on the streets. Massive infrastructure works of highway construction, road widening, flyovers, MRTS are in progress. A considerable amount of infrastructure development is required to mitigate the surge of increased trips and urban mobility. Heavy construction equipment operate on these sites with diverted traffic during the construction of these infrastructure. Many of these sites are in the residential and commercial built-up areas. At several times abutting land-use are in silence zone (Hospital, Educational institutions, courts). Vehicular traffic is the main source of noise on streets. During construction phase, noise pollution is often associated with operating heavy equipment on site of construction. Several ill effects of constant exposure to noise pollution has been recorded. This research paper examines the temporal variation of Noise level at a double decker fly-over construction sitein the city of Patna, India and it’s physiological consequences. Key words: Noise pollution, Heavy construction equipment, Double decker flyover, HIGHLIGHTS 1. Maximum noise is at 9 AM on Ashok Rajpath (Patna College site) 2. Noise from construction activities at pedestrian level camouflage with traffic noise during day time. 3. Effective noise from construction activity at day time at pedestrian level is less than that of traffic noise. 4. Construction activity is prohibited during night time in Residential and silence zone. 1. INTRODUCTION By the year 2050, around 876 million people (52.8 %) of India’s population will reside in cities.(UN, 2018) A revamp of physical infrastructure is in process for all the metropolitan cities of India to cater this challenge of urbanization. These include the construction of roads, railways and airways infrastructure to connect the major cities of India. Noise pollution in India is gradually increasing in recent years, especially in urban centres (Ising & Kruppa, 2004). The city of developing nations need a fast, affordable and safe transportation system that caters to the mobility requirement of its residents. Arterial roads serve a variety of functions inside the suburb and are an essential part of the transportation system that carries both private and public vehicles (N & Jem, 2013; Ranpise et al., 2021). Development of infrastructure projects deploy heavy equipment’s at site which not only pollute the site (air pollution) but are also source of noise pollution. Road traffic, luxury sedans, industrial, construction equipment, industrial activities, and power equipment are common sources of these undesirable noises that are continuously released into the surrounding environment (Berglund et al., 1995). A significant portion of the overall traffic noise is created by the friction between vehicle tyres and the road surface (Freitas et al., 2018; Jamrah et al., 2006; Licitra et al., 2017; Ranpise et al., 2021). Vehicular traffic noise and the noise from heavy equipment add together with other sound sources to give a combined effect of total noise at a site. The most significant cause of ambient outdoor noise pollution is road traffic (Ranpise et al., 2021; Zambon et al., 2018). Although noise pollution is a subtle and slow killer, relatively less has been done to mitigate it. It has risen to the level of a threat to of life quality (Mishra et al., 2010; Sharifzadeh Mirshekarloo et al., 2018). Noise has seldom a catastrophic effect, but constant exposure of more than eight hours and often high level of prolonged transitory exposure to noise can have adverse effect on health. Sleep disruption, masking of electronic instrument sound like TV, mobile phones and disturbance in normal conversation reduce the quality of life and effects Original Article