Increased road side shops in Chennai

Hi Chennaities, I recently visited Velachery, Pallikaranai and observesed the number of road side food shops have increased drastically. This has caused so much of congestion for commuters and leads to traffic jam as well. Anna nagar roads have also become worse in last few years. There was a time when poor people did this for survival, but now it looks like more of a business by sophisticated people and youngsters. Really curios whether the road side food shops are approved by the corporationsm. Do people need to pay some money or rent to the corporation? Do they have any limitations for the number of shops in a area.