Folsom Street is a north-south artery that runs through Boulder. It already has a bike lane, but in the summer of 2015, officials decided to try an experiment. On a mile-long stretch, they would try to make the street even more bike-friendly. To do this, they took away a car lane and added wider, buffered bike lanes set off from the street by white plastic posts. The experiment was supposed to last a year, while the city collected data on changes to traffic speeds, crash data and the number of cyclists using the improved corridor. Yet after a huge public outcry, Boulder backed away from the changes less than three months in.