PBS is running a show right now on Street Art

The street is a space where art thrives, and a place where artists can shape the public aesthetic. Olek, a sculpture who knits, and Swoon, a mixed media artist, disrupt daily life with work that creates wonder, emotion, and humor. Equally at home in museums and galleries, both artists also create installations that challenge the formats of traditional art spaces. With powerful layers of meaning, beautiful aesthetics, and using unique media, these two prolific creators are pushing the boundaries of contemporary art.

There is a huge difference however between art that takes place outside the museum/gallery system, but still implicitly addresses them, and the activist-based art practices I write about, which were aimed squarely at a non-art world public. 
I know there are many people interested in the latter, as the most common keyword searches that bring visitors to my blog are associated with Suzanne Lacy and Leslie Labowitz, who created some of the most elaborate public art pieces.  
Lynn Hershman Leeson has made a fantastic documentary about feminist art from the 1970s.  

40-plus years in the making, the director traces one of the most overlooked, essential movements in contemporary art, critiquing, in a classic intersectional, feminist way, the power structures that traditionally determine what goes in the history book and galleries and who gets access to it.

So make sure to catch !W.A.R., !Women Art Revolution! (a secret history) if it comes to a city near you!