The review found several opportunities to improve service, including additional trains during the afternoon peak period to operate every eight minutes instead of every 10 minutes, contingent on identifying $700,000 in additional funding for that service. Adjusting operating times and changing the locations where trains stop within stations can all help make the onboard passenger loads more even between scheduled trains and between the cars in individual trains.

The review studied all elements of how subway service operates on the line, including scheduling conflicts with other train lines that use the same tracks, how train personnel prepare their trains to enter service at terminals and where trains stop at its 21 stations — even where benches are placed within those stations. The review was performed at the request of New York State Senators Daniel Squadron and Martin Malavé Dilan.

The review found that G Subway Line Icon train ridership, while growing, is relatively light compared to that of other subway lines, and that the line performs well as measured by on-time performance as well as wait assessment measures. However, the need to share tracks with the F Subway Line Icon line in Brooklyn can cause uneven wait times and loading, which are more pronounced because G Subway Line Icon line customers make twice as many transfers as most subway customers.

The northern section of the G Subway Line Icon line was severely damaged during Superstorm Sandy in October 2012 and needs intensive restoration over the next year to remove and replace damaged equipment that was soaked in corrosive salt water. That work requires the G Subway Line Icon line to shut for 12 weekends in 2013 and for five weeks in the summer of 2014.

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