NEW YORK (CBSNewYork) – Gov. Andrew Cuomo brought in a team of engineers to survey the damage inside the Gateway Tunnel overnight on Thursday.

Cuomo and his team were looking into Gateway Tunnel as part of their ongoing L train shutdown evaluation. Last week the same team toured the Canarsie tunnel ahead of the scheduled shutdown. The MTA plans to close the Canarsie tunnel for 15 months of repairs.

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The governor asked the team to compare the corrosion and repair plans to make sure the L train shutdown scheduled to start in April will really take 15 months as planned.

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The closure is expected to disrupt travel for more than 200,000 commuters.

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Both tunnels were flooded during Superstorm Sandy. Several plans are being look at to ease travel during the closure period.