Surveillance cameras are being installed within NJ Transit regional trains in order to monitor security and behavior. Currently cameras are only being installed in trains that NJ Transit runs under contract for Metro-North, but an agency spokesperson said that cameras will be added to other lines as funding becomes available.

Italy's longest metro system now combines video surveillance and public-address communication to manage evacuation measures.

Metra, a commuter train service, announced its plans to ramp up security for the NATO Summit, including closing 26 stations on Monday, May 21.