Defining street vending as a art, and making it perform at public space gives essence of identity and belonging. Also, it leaves sense of adjustments in sustaining their art of living.
Streets are part of public spaces and for many people constitute the best places for human interactions and for economic activity. Even at the international level, the task of defining public space is still in its infancy. In addition to representing any type of lands that is publicly owned or available for public use, the concept of public space also encompasses a wide range of environments such as sidewalks, gardens, parks, conservation areas and streets. It is further flexibly conceived in the particularity of spatial, historic, environmental, social and economic features (UN Habitat; UNESCO 2017; APA 2017).
I'm not sure if the street seller's thinking about art at all. It's the large problem of living for them. They become objects of photographic art to explore a place for us, as a tourist.
I agree with Mamun Rashid and doubt, if the image that is displayed at the start of this discussion has been produced by street sellers. It does not necessarily mean that the locations they occupy are not used by others, but those who do graffiti. If this is correct then they street sellers and the graffiti provide the background of photographic art.....
Street trading has for decades, even centuries, been exciting the favourite motif of artists and photographers. An introspective view of how street traders ply their craft - arrangement of wares, colour matching, dusting/washing, positioning, etc - reveals that the preoccupation is synonymous with other art forms. Like artists and photographers, street traders strive to impress their customers well enough to make a purchase or two.