Cyclists told to spread out while riding in groups to minimise effects of pollution from overtaking vehicles A new study has found that fumes from passing cars can become trapped within a group of cyclists, increasing their exposure to pollutants cycling
By spreading out and riding further apart as a motorist attempts to overtake, cyclists riding in groups can reduce their exposure to harmful vehicle emissions, a recent study has found.
, captured results – using a scale model of a typical London street – from a vehicle positioned in front of the four riders and one adjacent to them, replicating an overtaking position. When the wind is stronger, however, positioning with the group becomes more important, and the researchers say that riding towards the back on a blustery day can be a good strategy to minimise exposure.
To mitigate the effects of pollution on all members of the group the researchers recommend that, when a motorist is overtaking, the riders within it should spread out, allowing some of the trapped fumes to escape. The new research, as well as advising pollution-conscious cyclists on the best riding position within a group, also suggests that group riding should be considered by urban planners when designing mitigation strategies to minimise cyclists’ exposure to fumes within towns and cities, especially where busy and narrow cycle lanes often result in cyclists riding in line.
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