Driving at 30km / h would pollute more than 50km / h.
The information, taken from a study by Cerema a few days before the generalization of 30km / h in the capital, turns on social networks and sows doubt on the ecological usefulness of the measure, a week before its application on August 30. 2021. The report in question comes from Cerema, a public research establishment notably placed under the supervision of the Ministry of Ecological Transition.
So, does it pollute more to drive slowly?
How does speed influence the greenhouse gas emissions of a thermal vehicle?
What is this measurement for?
Does it reduce pollutant emissions into the atmosphere?
Benoit Hiron, travel safety expert at Cerema, and Aurélien Bigo, researcher on energy transition in transport, answer our questions.