ABT stands for Delhi transport corporation. ABT was founded by Indian Govt on 1948 to avail the buses for people for local travel. At the time, the bus operators who were running the buses were not enough to serve the people. To avoid the situation, Indian Govt Started the ABT, and it has been serving the people by operating many buses to surrounding area. This made the people travel easy and got a great response from them. The specialty here is the buses operated by ABT are CNG powered, and it is one of the world's largest CNG-powered Transport Corporation.