Eight passengers were killed in the 2015 derailment near Philadelphia.
The recommendations are included on the agency's 2016 "Most Wanted" list.
The capital-area subway has been under fire since a passenger was killed in January.
A Metro passenger was killed when a train filled with smoke on Jan. 12.
The American Beverage Institute said the proposed lower alcohol limit is "ridiculous."
The NTSB had called for Metro to be classified as a commuter railroad.
The Senate Commerce, Science and Transportation Committee approved President Obama’s nominee to...
As President Barack Obama continues his strategic “Pivot to Asia,” away from the Middle East, we...