The introduction of 159 electric buses across Oxford has led to measurable reductions in both air pollution and traffic noise, according to new provisional research examining the impact of the city’s expanding zero-emission fleet.
The battery electric buses were introduced following an £82.5 million agreement in 2023 involving Oxfordshire County Council, the government, Oxford Bus Company and Stagecoach West.
Initial findings suggest roadside nitrogen dioxide concentrations across Oxford fell by an average of 10 per cent between 2023 and 2024, with reductions reaching 24 per cent in areas of heavy bus traffic, including St Aldates and High Street.
Researchers also found that replacing diesel buses with electric vehicles reduced roadside traffic noise in central Oxford by an average of 5.1 decibels, a reduction comparable to moving three times further away from a busy road.
Councillor Andrew Gant, Oxfordshire County Council’s Cabinet Member for Transport Management, said:
“We are proud and thrilled that we were able to back our ambitions with political and financial capital, alongside our partners, to deliver a safer, cleaner, greener, better county for residents and visitors. This provisional data shows what a difference these electric buses are making to people’s lives already.”
The study was carried out by the NIHR-funded Public Health Intervention Responsive Studies Team, involving the Universities of Birmingham, Warwick and Keele in partnership with University of Oxford.
It examined air and noise conditions before, during and after the introduction of electric buses, while also gathering views from residents, commuters, passengers and transport stakeholders.
Dr Suzanne Bartington, Clinical Associate Professor in Environmental Health at the University of Birmingham, said:
“The transition to electric buses has had a measurable and meaningful impact on air and traffic related noise quality in Oxford. Importantly, we found that people noticed these changes – including less diesel fumes and fewer sleep disturbances, suggesting a real benefit for people’s lives.”
Electric buses now account for 69 per cent of daily bus mileage within Oxford and nearly half of daily bus flow across the city.
Operators say further expansion is planned, with 13 additional electric vehicles due to enter service in spring 2026.
