One of the company's station in Richmond, Va. was ruled to be out of compliance.
The high-ranking Democrat said $550 million could be used to fix damaged train tunnels.
The company is planning to increase capacity for the papal visit.
The company allegedly discriminated against a disabled worker.
The gridlock has emerged as a political issue as Gov. Chris Christie runs for president.
Officials considered cutting Indianapolis-to-Chicago service because of a change to federal rules.
The agency said cameras would provide invaluable information to accident investigators.
The company has agreed to add track crossings to its GPS maps.
Investigators had been criticized for taking so long to make a determination.
Lawmakers are planning to hold a hearing on the Philadelphia accident that killed eight passengers.
Spending ceilings have become unpopular with members of both parties.
The money would address "conditions along the tracks" of the Northeast Corridor.
Rail service on the Gulf Coast east of New Orleans has been dormant since 2005.
OPINION | Could an attack like the one in France happen on our trains? Absolutely.
The train capacity issue has become political as Christie runs for president.
The Senate has approved a delay, but the House has not yet acted.
Advocates say the tunnel would have eased commutes between New Jersey and New York City.
A Senate bill would have increased the amount that Amtrak can be sued for by as much as $95 million...
The lawmakers said Congress should boost funding after a deadly Amtrak crash.
Sen. Bob Casey criticized House Republicans for cutting Amtrak's funding by about $270 million.
Rep. Brooks (R-Ala.) called for the “courage to wean Amtrak from the taxpayer nipple.”
President Obama has nominated Sarah Feinberg to lead the agency.
The measure would have been included in a surface transportation funding bill.
Investigators say the system could have prevented last week's crash.