Professional drivers are facing a routine and serious health risk from diesel exhaust fume exposures at work. In what they described as “the largest real-world in-vehicle personal exposure study to date”, researchers from the MRC Centre for Environment and Health, Environmental Research Group and Imperial College London, found that professional drivers are regularly exposed to hazardous levels of diesel emissions as part of their work.
Other studies have linked diesel fume exposure at work to lung and blood cancer and heart, lung and other diseases). The new study funded by safety professionals’ organisation IOSH found that professional drivers are disproportionately affected by exposure to diesel exhaust fumes, including taxi drivers – the worst hit group – couriers, bus drivers and drivers working for the emergency services.
Dr Ian Mudway of Imperial College London, who led the DEMiSt research team, said: “We believe there are around a million people working in jobs like these in the UK alone, so this is a widespread and under-appreciated issue – indeed, it was very noticeable to us just how surprised drivers taking part in the study were at the levels of their exposure to diesel.”
In total, 11,500 hours of professional drivers’ exposure data were analysed in the baseline monitoring campaign. The results showed that, on average, professional drivers were exposed to 4.1 micrograms of black carbon per cubic metre of air (µg/m3) while driving, which was around four times higher than their exposure at home (1.1 µg/m3).
The levels recorded at home would be similar to levels experienced by office workers at their desks, the researchers said. The study found massive exposure spikes often occurred in congested traffic within Central London, in areas where vehicles congregate, such as in car parks or depots, as well as in tunnels and ‘street canyons’ (between high buildings).