August's power blackout was the first major test for disaster plans drawn up for New York following the 11 September attacks in 2001.
The power failure left over 400 subway trains stranded and of these around 200 had to be evacuated inside tunnels.
According to subway operator New York City Transit, the procedure was carried out to plan in cooperation with the police and fire departments.
Recovery of New York's public transport system swung into action in parallel with a massive operation to evacuate 350,000 stranded passengers from the subway network.
But as commuters flooded on to the streets, the bus system was unable to cope with the numbers, particularly as traffic light failure caused gridlock in Manhattan.
On the subway, all non-vital engineering maintenance was cancelled to enable the subway system to be brought back on line without unnecessary disruptions. As a result, by the following Monday morning rush hour virtually the entire system was operating normally.