This type of art is known as street painting and also commonly known as pavement art and sidewalk art. The most amazing thing in this type of art is its illusion. Most of the paintings are in 3d form and the illusion comes when composing the real with the imagination. For example to see a very deep hole in the street or a monsters trying to escape to the real life. It's really fabulous. In my post I've bring a collection of the street art illusion examples, and all of them will melt your brain when watching them. All of these paintings are painted by the artist Kurt Wenner.
I want to mention here that when you see these paintings in real life you will not see it as in these photos because these photos was captured in a certain angle.
About the painter,Kurt Wenner. He is an American artist, he began his painting work in 1982 in Rome, then by 1983 he took his already existing paintings form to the street by drawing. In 1984, Kurt Wenner appear in the TV by the National Geographic documented film called Masterpieces In Chalk, and at the same year he won at the Grazie festival the title of "Maestro Madonnaro" which means ("best" or "featured" chalk artist) .