signs of spring in nyc

...one of the signs, according to the NYT:

Friday night Critical Mass bicycle protests get crowded. "Attendance definitely drops in the winter because it's so cold, and it's harder to bike in the snow," said Leah Rorvig, a participant. A typical winter ride comprises 100 to 150 people. "It peaks in the summer, with 1,000 to 2,000."