From their event page: 

Join Independence Blue Cross, the Bicycle Coalition, Philly Bike Train and elected officials as we ride together for a safer, more comfortable, and social commute to Center City! All wheels and abilities welcome!

Bike trains will leave from *five* locations to City Hall, where we will hold a press conference celebrating cycling as transport and emphasizing the need for Vision Zero & creating safer streets for bicyclists and pedestrians. Join at the start or along the way. We follow traffic laws and look out for each other.

Join the fun! >>