New York, NY —

The proposed overhaul of Penn Station may not just be about improving the passenger experience. It may actually be about increasing the number of passengers who pass through the facility.

REPORTER: Amtrak says that it has been studying how to add train tracks and platform space for a year. Anne Witt, vice president of business development, would not say how much capacity could be created but is certain it could be done.

WITT: It's basically to see if there is a way to create additional platforms underground that would allow for the movement of trains there.

REPORTER: A team of real estate developers has proposed moving Madison Square Garden, which stands directly over Penn Station, and putting a giant skylight in its place. The $2.5 billion project is short of cash. But adding train capacity could make it eligible for hundreds of millions of dollars of federal transportation funding.