I'm genuinely curious how much doing heavy aerobic exercise (cycling) right next to a road with a bunch of cars affects my life expectancy. Especially since we'

I'm genuinely curious how much doing heavy aerobic exercise (cycling) right next to a road with a bunch of cars affects my life expectancy. Especially since we're starting to discover that things like the tire dust from car tires wearing down while driving also has a huge impact on areas near roads. I know a singer that avoids doing any heavy exercise near major roads because it affects their performance after even just after a short exposure.