Background: Traffic-related air pollution poses a significant occupational health risk, particularly for commercial drivers in rapidly urbanizing cities. This study assessed exposure to fine particulate matter (PM2.5) and its association with self-reported respiratory symptoms among commercial drivers in Abuja, Nigeria. Methods: A cross-sectional study was conducted among 400 commercial drivers from two local government areas. Ambient PM2.5 concentrations were measured using a calibrated Bosean portable dust detector at four motor parks over four weeks. Respiratory health data were collected using the American Thoracic Society Respiratory disease questionnaire (ATS-DLD-78) administered by interviewers. Logistic regression was used to explore associations between PM2.5 and respiratory symptoms. Results: 24-h mean PM2.5 concentrations ranged from 53.6 to 76.2 μg/m3, exceeding WHO guideline limits at all sites. Prevalent respiratory symptoms included cough 81.0%, (95% CI: 77.0–84.5), phlegm production 68.4% (95% CI: 45.5–55), runny/blocked nose 70.8% (95% CI: 66.0–75.3), wheezing 19.5% (95% CI: 15.8–23.8) and breathing difficulty 21.8% (95% CI: 17.8–26.0). Higher PM2.5 exposure was significantly associated with increased odds of doctor-diagnosed asthma (AOR = 13.2; 95% CI: 6. 9–25.4; p < 0.001), although this exploratory finding warrants further investigation using more robust exposure assessment and longitudinal study designs. Driving experience, daily work hours, age, and income were also significant predictors of respiratory symptoms. Conclusion: Commercial drivers in Abuja are exposed to PM2.5 concentrations substantially exceeding WHO guidelines, with a high burden of associated respiratory morbidity. Targeted occupational health interventions, strengthened emission regulations, and improved road infrastructure are needed. Further, there is need to safeguard public health in Nigeria through regulatory standards that aligns with latest scientific evidence on PM2.5.
- Open Access
- Article
Exposure to Traffic-Related Particulate Matter and Prevalence of Respiratory Symptoms among Commercial Drivers in Abuja, Nigeria
Author Information
Received: 03 Apr 2026 | Revised: 30 Jun 2026 | Accepted: 09 Jul 2026 | Published: 26 Aug 2026
Abstract
Keywords
PM2.5 | traffic air pollution | respiratory symptoms | occupational exposure | commercial drivers | Abuja
References
- 1.
Aliyu, A.A.; Sa’idu, H. An Overview of Air Pollution and Its Health Effects on Urban Settlement: A Nigeria’s Perspectives. Bima J. Sci. Technol. Gombe 2020, 4, 362–372.
- 2.
Yaduma, N.; Kortelainen, M.; Wossink, A. Estimating Mortality and Economic Costs of Particulate Air Pollution in Developing Countries: The Case of Nigeria. Environ. Resour. Econ. 2013, 54, 361–387.
- 3.
Fuller, R.; Landrigan, P.J.; Balakrishnan, K.; et al. Pollution and Health: A Progress Update. Lancet Planet. Health 2022, 6, e535–e547.
- 4.
World Health Organization. Ambient (Outdoor) Air Pollution. 2024. Available online: https://www.who.int/news-room/fact-sheets/detail/ambient-(outdoor)-air-quality-and-health (accessed on 19 March 2026).
- 5.
World Health Organization. Air Pollution. 2025. Available online: https://www.who.int/health-topics/air-pollution#tab=tab_1 (accessed on 19 March 2026).
- 6.
World Health Organization. Air Quality Guidelines—Update 2021; WHO Regional Office for Europe: Copenhagen, Denmark, 2021.
- 7.
Hoffmann, B.; Boogaard, H.; de Nazelle, A.; et al. WHO Air Quality Guidelines 2021–Aiming for Healthier Air for All: A Joint Statement by Medical, Public Health, Scientific Societies and Patient Representative Organisations. Int. J. Public Health 2021, 66, 1604465. https://doi.org/10.3389/ijph.2021.1604465.
- 8.
Sadiq, A.A. Effect of Particulate Emissions from Road Transportation Vehicles on Health of Communities in Urban and Rural Areas, Kano State, Nigeria. Ph.D. Thesis, Université Claude Bernard-Lyon I, Villeurbanne, France, 2022.
- 9.
Mustapha, B.A.; Blangiardo, M.; Briggs, D.J.; et al. Traffic Air Pollution and Other Risk Factors for Respiratory Illness in Schoolchildren in the Niger-Delta Region of Nigeria. Environ. Health Perspect. 2011, 119, 1478–1482.
- 10.
Ifebi, O.; Obi-George, L.; Maduka, N.; et al. Integration of Biophilic Design Elements in Hotel Building Environment towards Enhancing Users Wellbeing in Abuja, Nigeria. Int. J. Innov. Environ. Stud. Res. 2024, 12, 134–151.
- 11.
Ejohwomu, O.A.; Oladokun, M.; Oshodi, O.S.; et al. The Exposure of Workers at a Busy Road Node to PM2.5: Occupational Risk Characterisation and Mitigation Measures. Int. J. Environ. Res. Public Health 2022, 19, 4636.
- 12.
Wambebe, N.M.; Duan, X. Air Quality Levels and Health Risk Assessment of Particulate Matters in Abuja Municipal Area, Nigeria. Atmosphere 2020, 11, 817.
- 13.
Kolawole, T.O.; Olatunji, A.S. Assessment of Concentration of the Potentially Toxic Elements and Associated Human Health Risk from Particulate Matter Exposure along Road Intersections in Ibadan, Southwestern Nigeria. Discover Environ. 2023, 1, 3.
- 14.
Adikaram, W.D.C.N.; Arambepola, C. Occupational Hazard to On-Road Air Pollution within Passenger Transport Micro-Environments: Evidence from Traffic Congested Areas in Colombo, Sri Lanka. BMC Public Health 2025, 25, 2253.
- 15.
Thangavel, P.; Park, D.; Lee, Y.C. Recent Insights into Particulate Matter (PM2.5)-Mediated Toxicity in Humans: An Overview. Int. J. Environ. Res. Public Health 2022, 19, 7511.
- 16.
Yang, H.H.; Park, I.J.; Kim, C.R.; et al. Vehicle Indoor Air Quality Due to External Pollutant Ingress While Driving. Atmosphere 2025, 16, 1238.
- 17.
Ayub, Z.A.; Jalaludin, J.; Mohd Isa, K.N.; et al. Evaluation of In-Vehicle Pollutants Exposure and Respiratory Symptoms among Bus Drivers in Kota Bahru, Malaysia. IOP Conf. Ser.: Earth Environ. Sci. 2022, 1013, 012010. https://doi.org/10.1088/1755-1315/1013/1/012010.
- 18.
Hachem, M.; Bensefa-Colas, L.; Momas, I. The Impact of COVID-19 Lockdown Restrictions on the Short-Term Association between In-Vehicle Particulate Pollutants and the Respiratory Health of Parisian Taxi Drivers. Scand. J. Work Environ. Health 2023, 49, 367–374.
- 19.
Mohokar, A.; Mahajan, H.; Deoke, A.; et al. Evaluation of Respiratory Impairments among State Transport (ST) Bus Drivers. Eur. J. Cardiovasc. Med. 2025, 15, 665–670.
- 20.
Yankyera, B.O.; Twumasi, J. Driver Education and Awareness of In-Vehicle Air Pollutants and Health. Int. J. Emerg. Issues Soc. Sci. Arts Humanit. 2024, 2, 59–68.
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