A new study published in the Journal of the American College of Cardiology provides strong evidence that traffic noise is linked to an increased risk of hypertension. The research, released this month, demonstrates a clear association between elevated blood pressure and exposure to roaring engines, honking horns, and wailing sirens. Jing Huang, the lead author and Assistant Professor in the Department of Occupational and Environmental Health Sciences at Peking University’s School of Public Health, noted, “We were a little surprised that the association between road traffic noise and hypertension was robust even after adjustment for air pollution.” Unlike earlier studies that could not establish causality, this prospective analysis used United Kingdom Biobank data to track health outcomes over time. More than 240,000 participants aged 40 to 69, all free of hypertension at baseline, were followed for a median of 8.1 years. Road traffic noise exposure was estimated from residential addresses using the Common Noise Assessment Method, a European modelling tool. The findings showed that individuals living near noisy roads were more likely to develop hypertension, and the risk rose in proportion to the noise dose. Moreover, participants exposed to both high traffic noise and air pollution faced the greatest hypertension risk, suggesting a synergistic effect. Huang emphasized the importance of disentangling the independent impact of road traffic noise from the broader environmental context and indicated that field studies are now underway to explore the underlying pathophysiological mechanisms.
Earlier research supports these conclusions. In 2009, Theo Bodin and colleagues from Lund University Hospital in Sweden examined the relationship between proximity to noisy roads and elevated blood pressure. They reported that exposure above 60 decibels was associated with higher blood pressure among younger and middle‑aged adults, a key risk factor for cardiovascular events such as heart attacks and strokes. Their study of 27,963 respondents in Scania found that about 30 % of the European Union population experiences a day‑night average traffic noise exceeding 55 dB(A). Modest effects were observed across all age groups at levels below 60 dB(A), while more pronounced effects appeared at higher exposures, particularly among younger individuals; the oldest age group (60–80 years) showed no significant effect.
A 2022 review by Idoko et al. linked high environmental noise exposure globally to a range of health problems, including headaches, tinnitus, sleep disturbance, irritation, auditory damage, and ischemic heart disease. Traffic noise was identified as the most prevalent source of environmental noise. In Nigeria, a 2017 study by Banaadornwi Yorkor measured residential noise levels in Port Harcourt at 90–115 dB(A). In response, the Lagos State Environmental Protection Agency (LASEPA) banned amplifiers, microphones, and megaphones at motor parks in early 2022 and set maximum noise limits of 55 dB during the day and 45 dB at night for residential areas, and 90 dB for industrial zones. Cardiologist Dr Livinus Ede stressed the need for stricter enforcement of these regulations, improved road conditions, quieter vehicle technology, and action on air pollution—particularly since an IQAir report showed Lagos’s air pollution at seven to ten times WHO recommendations.
Hypertension remains a major public‑health challenge in Nigeria. The Nigerian Heart Foundation’s Executive Director, Dr Kingsley Akinroye, reported in 2022 that 38.1 % of the population—approximately 76.2 million people—are hypertensive, yet only one‑third receive treatment. The 2018 WHO Non‑Communicable Disease profile indicated that NCDs account for 29 % of deaths in Nigeria, with cardiovascular diseases responsible for 11 %. A 2018 systematic review estimated hypertension prevalence at 31.2 % (men 29.5 %, women 31.1 %). Registered nurse Chibee Okechukwu explained that noise induces stress and poor sleep, both of which elevate blood pressure. He urged greater awareness of the need for quiet, restful environments and avoidance of common urban stressors such as rush‑hour traffic, sirens, loud music, and public‑transport noise.
Healthcare professionals also emphasize preventive measures. Dr Tomiwa Fagbemi, Senior Registrar in Internal Medicine at the Federal Medical Centre, Abeokuta, called for regular blood‑pressure monitoring and dietary changes. He recommended increased consumption of fruits, vegetables, and low‑fat dairy, while limiting saturated fats, cholesterol, trans fats, sugary drinks, and sweets. Regular exercise, weight management, medication adherence, and routine clinic visits were highlighted as essential components of hypertension control.
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