From their event page: 

Join the Bicycle Coalition, Philly Bike Action, 5th Square, and Families for Safe Streets of Philadelphia on Thursday, August 15th at 4 pm for a rally on the north side of City Hall before we deliver petitions to Council Member Kenyatta Johnson’s office. We are holding the City accountable and making sure they know exactly what their constituents demand of them to keep our community safe.

Signs and noise makers are welcome.