Metropolitan Transportation Authority crews are using three transformers from Con Edison to restore partial power to a crippled Metro-North track.
The transformers could add about 13,000 kilowatts of power, far less than the 100,000 normally needed to power the line to New Haven.
Officials will run tests to see how many trains that can power.
Con Ed says full repairs could take up to three weeks, which means commuters could be facing new schedules, cramped platforms and crowded diesel trains for a while.
"I feel like that MTA has existed long enough to be able to fix this within a shorter period of time," said one commuter.
"For an hour commute, it took me about close to two hours to get here," said another. "It puts you off track, but for the most part, I'm just dealing with it."
"There's always an excuse with them," said a third. "It's something that, if they were working on it and they did it, they need to fix it right away."
For more information and travel alternatives, visit MTA.info.