Amtrak is calling its first week of summerlong track work at New York's Penn Station a success.

Friday marked the fifth day of major repairs that are forcing commuter rail lines to cut back schedules at the nation's busiest train station. Service on New Jersey Transit lines were also impacted.

Amtrak chief operating officer Scot Naparstek says that the first week went smoothly and work to replace tracks and switches is even a bit ahead of schedule. He commends commuters for their patience and ability to adapt to new schedules by taking earlier or later trains or other forms of transportation.

Naparstek says there were no other problems such as overhead wire failures in tunnels that would have slowed down the project this week. He calls the week "very good."

The work is expected to be complete by Labor Day.