Metro says some rail operators have been disabling emergency intercoms on trains.
Metro’s red line crash three years ago that killed nine people is leading to greater federal oversight of public transit systems.
Metro’s board of directors voted Thursday for the first increase in bus and rail fares in the system in two years. The hike raises the average rail fare by about 5 percent. Bus fares are increasing by a dime, rising to $1.60 for those who use SmarTrip cards.