Dense cities where public transit was already popular generally saw the largest increases. In cities with lower density, more cars per capita and higher traffic speeds, the increase in cycling was more modest. Paris, which implemented its bike lane program early and had the largest pop-up bike lane program of any of the cities in the study, had one of the largest increases in riders.
“It almost seems like a natural law that the more infrastructure you have, the more cycling you will have,” said Sebastian Kraus, the study’s lead author.
But in public transit research, the effect of adding bike lanes is a matter of debate.