I took a bike ride yesterday, on a very straight road where the cars are racing ... I try to avoid it in my walks but there I had no choice!
Well a few seconds after a car had passed I could smell if the driver (or an occupant of the car) was smoking !! Most cars were going over 100 km / h ... the smell was especially valid for cars coming in front ...
No time to see if the windows were open or not ... in any case they weren't in great style elbow out 80s fashion ... (at high speed not possible ...)
So even in this case
High speed auto VS bike + 4-5m distance, there is a risk of swallowing respiratory particles from car occupants !!!
This does not mean that the airborne particles were enough to contaminate me but that I could smell, therefore breathe, particles that had been in the lungs of an occupant of the car!ps: I quit smoking at the end of 2020 ... I smoked very moderately (5-10 rolled up cigarettes a day) and I think I never had a great sense of smell ...