The federal grants will help strengthen safety, modernize infrastructure, and support continued operations at the facility.
Acela trains will now be able to whiz through a section of New Jersey at speeds of up to 150 miles per hour.
Images from the scene show a bus atop a section of the bridge that's sloped upright at a near 45-degree angle.
The national program, the largest investment in bridges since the interstate highways were built, will deliver $1.6 billion to Pennsylvania alone.
It will allocate nearly $27 billion in funding to repair and replace bridges.
The funds will help create about 11,000 permanent and temporary jobs at the Philadelphia International Airport, officials said.