NEW YORK (WABC) -- The F and M subway lines will swap routes on weekdays only.

The change will affect eight stations between Jackson Heights and Midtown, including 63rd and Lexington and 53rd and 5th Avenue.

F trains will now stop at Queens Plaza, Court Sq-23 St, Lexington Av/53 St, and 5 Av/53 St. These stations are currently served by the M.

M trains will now stop at 21 St-Queensbridge, Roosevelt Island, Lexington Av/63 St, and 57 St. These stations are currently served by the F.

The MTA says the goal is to cut down on overcrowding and delays on the Queens Boulevard line.

"There's a merge at Queens Plaza, which is a chokepoint which creates all kinds of crossing and throughput problems, and which actually causes a ton of delays," said MTA Chairman and CEO Janno Lieber.

Delays that

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