Exposure to ultrafine and fine particles and noise during cycling and driving in 11 Dutch cities

Recent studies have suggested that exposures during traffic participation may be associated with adverse health effects. Traffic participation involves relatively short but high exposures. Potentially relevant exposures include ultrafine particles, fine particles (PM2.5) and noise. Simultaneously, detailed real time exposure of particle number concentration (PNC), PM2.5 and noise has been measured while driving and cycling 12 predefined routes of approximately 10–20 min duration. Sampling took place in eleven medium-sized Dutch cities on eleven weekdays in August till October 2006. To investigate variability in cyclists exposure, we systematically collected information on meteorology, GPS coordinates, type of road, traffic intensity, passing vehicles and mopeds while cycling. The overall mean PNC of car drivers was 5% higher than the mean PNC of cyclists. The overall mean concentration of PM2.5 in the car was 11% higher than during cycling. Slightly higher 1-min peak concentrations were measured in the car (PNC 14%; PM2.5 29% for 95-percentiles). Shorter duration peaks of PNC were higher during cycling (43% for 99-percentile of 1-s averages). Peaks in PNC typically last for less than 10 s. A large variability of exposure was found within and between routes. Factors that significantly predicted PNC variability during cycling were: passing vehicles (mopeds, cars), waiting for traffic lights, passing different types of (large) intersections and bicycle lanes and bike paths close to motorized traffic. No relation was found between PM2.5 and those predictor variables. The correlation between PNC and noise was moderate (median 0.34). PM2.5 had very low correlations with PNC and noise. PNC and PM2.5 exposure of car drivers was slightly higher than that of cyclists. PNC was largely uncorrelated with PM2.5 and reflected local traffic variables more than PM2.5. Different factors were associated with high PNC and high noise exposures.

[1]  Yifang Zhu,et al.  Study of ultrafine particles near a major highway with heavy-duty diesel traffic , 2002 .

[2]  A. Peters,et al.  Exposure to traffic and the onset of myocardial infarction. , 2004, The New England journal of medicine.

[3]  Michael Brauer,et al.  Particulate matter exposure along designated bicycle routes in Vancouver, British Columbia. , 2008, The Science of the total environment.

[4]  Ronald W. Williams,et al.  Particulate matter exposure in cars is associated with cardiovascular effects in healthy young men. , 2004, American journal of respiratory and critical care medicine.

[5]  Jan Willem Erisman,et al.  Variability of particulate matter concentrations along roads and motorways determined by a moving measurement unit , 2004 .

[6]  G. Oberdörster,et al.  Nanotoxicology: An Emerging Discipline Evolving from Studies of Ultrafine Particles , 2005, Environmental health perspectives.

[7]  Julia Meaton,et al.  ASSESSMENT OF EXPOSURE TO TRAFFIC-RELATED FUMES DURING THE JOURNEY TO WORK , 1998 .

[8]  B. Brunekreef,et al.  Validity of residential traffic intensity as an estimate of long-term personal exposure to traffic-related air pollution among adults. , 2008, Environmental science & technology.

[9]  Steffen Loft,et al.  Personal Exposure to Ultrafine Particles and Oxidative DNA Damage , 2005, Environmental health perspectives.

[10]  Bert Brunekreef,et al.  Estimated long-term outdoor air pollution concentrations in a cohort study , 2007 .

[11]  Mark J. Nieuwenhuijsen,et al.  Assessment of road users’ elemental carbon personal exposure levels, London, UK , 2002 .

[12]  Mark J. Nieuwenhuijsen,et al.  Personal exposure of street canyon intersection users to PM2.5, ultrafine particle counts and carbon monoxide in Central London, UK , 2005 .

[13]  Mark J. Nieuwenhuijsen,et al.  Fine particle (PM2.5) personal exposure levels in transport microenvironments, London, UK. , 2001, The Science of the total environment.

[14]  David Briggs,et al.  Personal exposure to particulate air pollution in transport microenvironments , 2004 .

[15]  Kees de Hoogh,et al.  Effects of travel mode on exposures to particulate air pollution. , 2008, Environment international.

[16]  B. Brunekreef,et al.  Relationship between different size classes of particulate matter and meteorology in three European cities. , 2005, Journal of environmental monitoring : JEM.

[17]  Bert Brunekreef,et al.  Traffic-related differences in indoor and personal absorption coefficient measurements in Amsterdam, the Netherlands , 2005 .

[18]  N. Laird,et al.  Meta-analysis in clinical trials. , 1986, Controlled clinical trials.

[19]  Frank Borgman.  38 – The Cycle Balance: benchmarking local cycling conditions , 2003 .

[20]  Scott Fruin,et al.  Mobile platform measurements of ultrafine particles and associated pollutant concentrations on freeways and residential streets in Los Angeles , 2005 .

[21]  Henk M E Miedema,et al.  Hypertension and Road Traffic Noise Exposure , 2007, Journal of occupational and environmental medicine.

[22]  J. Rank,et al.  Differences in cyclists and car drivers exposure to air pollution from traffic in the city of Copenhagen. , 2001, The Science of the total environment.

[23]  R. Harrison,et al.  Dependence of Home Outdoor Particulate Mass and Number Concentrations on Residential and Traffic Features in Urban Areas , 2007, Journal of the Air & Waste Management Association.

[24]  L. Gill,et al.  Exposure to hydrocarbon concentrations while commuting or exercising in Dublin. , 2007, Environment international.

[25]  Pamela Ohman-Strickland,et al.  Respiratory effects of exposure to diesel traffic in persons with asthma. , 2007, The New England journal of medicine.

[26]  L J Schouten,et al.  The joint association of air pollution and noise from road traffic with cardiovascular mortality in a cohort study , 2008, Occupational and Environmental Medicine.

[27]  David Briggs,et al.  Journey-time exposure to particulate air pollution , 2007 .

[28]  Mark J. Nieuwenhuijsen,et al.  Fine particulate matter and carbon monoxide exposure concentrations in urban street transport microenvironments , 2007 .

[29]  Aonghus McNabola,et al.  Relative exposure to fine particulate matter and VOCs between transport microenvironments in Dublin : Personal exposure and uptake , 2008 .

[30]  A. Verhoeff,et al.  The exposure of cyclists, car drivers and pedestrians to traffic-related air pollutants , 1995, International archives of occupational and environmental health.

[31]  H W Davies,et al.  Correlation between co-exposures to noise and air pollution from traffic sources , 2006, Occupational and Environmental Medicine.

[32]  Ilias G. Kavouras,et al.  Spatial variation of particle number and mass over four European cities , 2007 .

[33]  I L Gee,et al.  Commuter exposure to respirable particles inside buses and by bicycle. , 1999, The Science of the total environment.

[34]  A. Tobías,et al.  Use of Poisson regression and Box–Jenkins models to evaluate the short-term effects of environmental noise levels on daily emergency admissions in Madrid, Spain , 2004, European Journal of Epidemiology.

[35]  Juha Pekkanen,et al.  Exposure assessment of ultrafine particles in epidemiologic time-series studies. , 2004, Scandinavian journal of work, environment & health.