Big Bertha, named for former city mayor Bertha Knight Landes, will dig up to 100 feet a day and build a massive tunnel under the city for a new freeway.
Marketplace Economics Correspondent Chris Farrell joins Morning Report host Jeremy Hobson to discuss the state of infrastructure in the U.S. and whether the country can afford to improve it.
Mayors along the Mississippi River say more funding is needed to shore up aging infrastructure.
The U.K.'s economy is expected to shrink this year. There are calls for the government to spend more money on infrastructure projects -- including adding another runway at London's Heathrow Airport.