A distinct feature of Bangkok is the ubiquity of street vendors selling goods ranging from food items to clothing and accessories. It has been estimated that the city may have over 100,000 hawkers. While the BMA has authorised the practice in 287 sites, the majority of activity in another 407 sites takes place illegally. Although they take up pavement space and block pedestrian traffic, many of the city's residents depend on these vendors for their meals, and the BMA's efforts to curb their numbers have largely been unsuccessful.