Êtes-vous bien exposé?

Une (autre) étude, celle-ci Néo-Zélandaise, a démontrée la dangerosité de l'exposition des humains à la pollution routière.  Voici l'article sur le site de l'Agence de transport de la NZ, Waka Kotahi (c'est plus beau que ponts et chaussées):


This purpose of this project is to assess the comparative risk associated with exposure to traffic pollution when travelling via different transport modes in New Zealand cities. Concentrations of the key traffic-related pollutants were simultaneously monitored on pre-defined routes in Auckland and Christchurch during the morning and evening commute on people travelling by car, bus, on-road bike, train (Auckland only) and off-road bike (Christchurch only) from February to May 2009.   (C'est l'été down under)

The key results of this research are: 
• Car drivers are consistently exposed to the highest average levels of CO.
• On-road cyclists are exposed to higher levels of CO, PM1 and UFPs than off-road cyclists.
• Car drivers and bus passengers are exposed to higher average levels of UFP than cyclists.
• At some parts of their journeys, travellers are exposed to very high levels of pollution, often for short periods of time.
• Locating cycle paths just a short distance from roads can reduce pollution exposure significantly.
• One hour of commuting could contribute up to 20% of total daily CO and UFP.
• PM10 and PM2.5 are inappropriate indicators of exposure to vehicle emissions.


et un extrait de rapport:



Relationships between heart rate… and oxygen uptake, and between [heart rate] and pulmonary ventilation… for each participant were established in laboratory tests. The [pulmonary ventilation] during cycling was four times higher than resting value. The level of air pollution exposure when cycling seemed to be comparable with the levels of exposure when sitting inside a vehicle


http://www.nzta.govt.nz/resources/research/reports/457/index.html


Santé Canada a fait une petite étude de ce genre en 2010, les résultats en 2012.


Je retiens surtout que les pistes cyclables en site propre (à 5-7 m de la route) sont recommandées par l'Agence, et que les autobus diesel, c'est de la scrap.  Le couloir du Rapibus ne va pas nous donner cette espace tampon mais la STO prévoit électrifier ses véhicules d'ici 20 ans (?).  Bien sur, oublier ça au centre-ville, mais c'est à méditer et surtout à discuter et négocier.

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