Photography, photography, photography.
First came photographs of the bike lanes.Someone took a trip to Europe and came back without any photos of the Dutch bike lanes, which we've heard so much about. But eventually, the Internet brought prodigious photos to America, thus proving the existence of bike lanes.
Now that the existence of bike lanes has been proven, new legislation is being passed to keep cars out of the bike lanes. (Can't tell them to stay out of a place that doesn't exist...)
Secondly comes the Go Pro contingent, who bring back photos of the cars, in the bike lanes. Now we have evidence for the prosecution.
Third comes more photos, to share on the internet , which gives solo riders the comradery of sharing the experience with others.
Additional photos show us new kinds of bicycles_ recumbents , electric ebikes, cargo bikes, velomobiles, fat tire snow bikes, trikes, and bike share rental bikes.