Elon Musk is talking to Chicago mayor Rahm Emanuel about the possibility of digging a tunnel from the city's downtown area to Chicago O'Hare airport, according to the Chicago Tribune.
Emanuel has called the discussions "preliminary," according to the Tribune. The mayor is exploring various options for developing a high speed rail line in Chicago, an idea Emanuel's predecessor, Richard M. Daley had talked about from time to time.
The Tesla and SpaceX CEO recently founded the jocularly titled "Boring Company" to begin developing machines and techniques for digging tunnels. Musk's main vision for the project so far has been a plan to dig a vast, layered network of underground roads that could reduce traffic in populous cities, such as Los Angeles.
Musk has said he thinks that he can reduce the currently high costs of tunneling, in part by making digging machines that can run continuously, and at a faster pace than they currently do, and by reducing the diameter of the tunnels.