The city of Portland, Oregon, United States, has experienced a boom in the number of food carts due to relatively low regulation compared to other North American cities.[1]
^Newman, Lenore Lauri; Burnett, Katherine (February 2013). "Street food and vibrant urban spaces: lessons from Portland, Oregon". Local Environment. 18 (2): 233–248. doi:10.1080/13549839.2012.729572.