Less traffic on the road just means that others who previously didn't will take to the roads because there is less traffic: https://en.wikipedia.org/wiki/Induce

Less traffic on the road just means that others who previously didn't will take to the roads because there is less traffic: https://en.wikipedia.org/wiki/Induced_demand https://en.wikipedia.org/wiki/Induced_demand It is unlikely that there is a 1:1 relationship between number of people that take a scooter instead of car and the actual measured reduction on the road. In fact, I'd bet it is negligible.