By early 2016, delays as a result of overcrowding were up to more than 20,000 every month, four times the amount in 2012. The overcrowded trains have resulted in an increase of assaults because of tense commuters. With less platform space, more passengers are forced to be on the edge of the platform resulting in the increased possibility of passengers falling on the track. The MTA is considering platform screen doors, which exist on the AirTrain JFK to prevent passengers falling onto the tracks. In order to prevent hitting passengers who could fall onto the tracks, train operators are being instructed to go into stations at lower speeds. The increased proximity of riders could result in the spread of contagious diseases.