Just took a quick look there. First two paragraphs:

"In Toronto, the average increase in cycling two years after installation of a bike lane was found to be 23%.
Source: Shifting Gears: City of Toronto Bike Plan (June 2001); City of Toronto
Construction of new bicycle lanes and paths in Minneapolis was correlated to an increase in modal share of bicycle traffic from 1.7% to
2% in the area where facilities were built, while there was no change in ridership in other parts of the city. Central city trips crossing the
Mississippi River showed a much larger increase than trips that did not; reflecting a number of significant improvements to bicycle
accommodation on bridges.
Source: A Longitudinal Analysis of the Effect of Bicycle Facilities on Commute Mode Share (2005); Barnes, Thompson & Krizek;"

Obviously there are many variables. Infrastructure changes followed by increases in cycling from zero and 1.7% use moving to 2%; compared to a 23% increase in Toronto. Hard to show cause and effect, although it is significant that they found increased ridership in relation to how close the facilities were to the riders' homes.