The transit agency is testing four systems to indicate if someone has wound up on the tracks.
Starting Friday night, there will be no R trains running between Court Street in Brooklyn and Whitehall Street in Manhattan.
The MTA said riders will now be able to fill their MetroCards with both unlimited-ride time and pay-per-ride dollars.
Transit agencies across the Tri-State area are responding to the powerful winter storm which is causing disruptions.
Spokesman Kevin Ortiz says they’re looking into ways to retrofit older cars with better speakers, specifically on the B, D, 1, 3 and 7 lines.
A video taken by a passenger when the doors opened showed a narrow walkway beneath the tracks and the street below.
The ice storm that struck the Tri-State area Wednesday morning not only caused problems for commuters, but it also had the potential to flare back up into a problem overnight into Thursday.