Metro officials will present a plan that could lead to the purchase of hundreds of new rail cars.
The $2 billion plan is described at the largest rail procurement in Metro history.
The plan to buy more than 600 new rail cars will be presented at a board meeting on Thursday, WTOP reported.
Metro spokesman Steven Taubenkibel said officials hope to replace the oldest rail cars, which were built in the 1970s.
The entire six-car train that slammed into the back of a parked train in June, killing nine people, was made up of the older rail cars.