To create their own, the Finnish collective Länsiväylä poured paint along one section of the street and then invited a group of cyclists to ride through it at midnight, leaving a visible trace of where bikes would ride if there were space, and creating a colorful new boundary.
Law-and-order types, worry not: The paint they used washes away with water. Unfortunately, that means that Hämeentie won't really have a permanent new bike lane. At least not yet: The huge turnout might make city planners take notice.
You can see more pictures of the event on Flickr.