Buttigieg: 'Now is the time' to improve infrastructure

"We also have a lot of work to do to improve the infrastructure in this country, a mission that will not only keep more people safe, but also grow our economy as we look to the future," former South Bend, Indiana, Mayor Pete Buttigieg said.

Biden put Buttigieg - a rival for the Democratic presidential nomination last year - in charge of the department that oversees aviation, highways, vehicles, pipelines and transit.

"Now is the time, and we have a real chance to deliver for the American people... So much is at stake today and so much is possible as our country works to emerge from the crises of this moment with bipartisan appetite for a generational opportunity to transform and improve America’s infrastructure," Buttigieg added.

Biden has also vowed to boost fuel economy standards that were slashed under Trump and take steps to increase the number of electric vehicles on American roads.

Congress has abandoned a decades-old policy of largely using fuel tax revenue to fund infrastructure repairs.