Have an idea to entertain the crowds for Philly Free Streets?

After those who braved the papal visit last year discovered a wonderful new world of biking and cavorting in car-free streets, it was only a matter of time until Philadelphians reclaimed the roadways — even if just for an annually occurring day.

For one day in September, Philly Free Streets, spearheaded by the Deputy Managing Director’s Office of Transportation and Infrastructure Systems (OTIS), will create a car-free stretch of over seven miles from one side of the city to the other. On September 24 from 8am-1pm, the Philly Free Streets route will wind from Front and South Streets to the Schuylkill River Trail, on to West River Drive and into Parkside and West Fairmount Park. (You can check out more info from PlanPhilly here.)

There’s no formal program or procession from one end to the other — participants are encouraged to stroll whatever part of the open streets they’d like, at any time during the event. And while there will be a range of things to do along the way, the goal is to create a walkable, ride-able stretch of city routes, not a street festival crowded with booths.

But the City is “seeking to include pop-up activities throughout the event route, in order to highlight the intersection of physical activity and public health and to demonstrate the vibrancy of Philadelphia,” according to Philly Free Streets.

OTIS is looking for applicants who want to help provide events along the way in the categories of exercise and wellness; eco-friendly living and sustainability; and arts, culture, and history. All pop-up activities must be appropriate for all ages (though they can be centered on adults rather than kids).

For now, it’s an all-volunteer gig: successful proposals must be free to the public and independently supplied (no City dollars or materials for set-up). A Philly Free Streets panel will evaluate submissions for “diversity of programming” and criteria like easy participation for large crowds.

Proposal forms, available here, should be filled out and e-mailed to [email protected] with “2016 Pop-up Activity” in the subject line. The proposal deadline is Friday, August 26.