The president was speaking in Bear, Delaware, to announce more than $16bn in new funding for 25 passenger rail projects.
According to a statement from the White House, the investments announced today will rebuild tunnels and bridges that are over 100 years old.
They will also upgrade tracks, power systems, signals, stations, and other infrastructure, as well as advancing future projects to improve travel times by increasing operating speeds and reducing delays.
Mr Biden chatted to Amtrak workers before taking to the stage in Bear.
The funding announced today comes from the approximately $1 trillion bipartisan infrastructure law that Mr Biden signed almost two years ago.
There will be a total $66bn investment in rail, the White House has said.