Why was the Interstate Commerce Commission established?
it was created in 1887 by president Cleveland with the Interstate Commerce Act. It was aimed at regulating transportation especially railroads.
The Gilded Age is an era in which transportation expanded like never before, the railroads whose constuction were fueled by the steel industry was the most obvious aspect of it.
Other modes of carriers could be regulated such as interstate buslines or telephone companies, basically anything that could could contribute to commerce.
The agency was abolished in 1995, and its remaining functions were transferred to the Surface Transportation Board.