MTA: Oh, ‘G,’ we’ll do full fix

The MTA is pushing back against calls from Brooklyn politicians to ditch plans for a six-week G-line shutdown to replace its ancient train control systems, arguing the alternative would mean a year of weekend closures — and add as much as $50 million to the cost.

Officials say they need the shutdown to get into the BrooklynQueens crosstown line’s tunnels and rip out the Depression-era stop light signals that frequently break and replace them with a new computerized system, which will increase reliability and allow trains to run more frequently.

The MTA’s tentative shutdown schedule would hit Greenpoint, Williamsburg, Bedford-Stuyvesant and Clinton Hill with a set of 24/7 outages over a six-week period:

June 28-July 5: No service between Court Square and Greenpoint Avenue;

July 5-Aug. 12: No service between Court Square and BedfordNostrand;

Aug. 12-Sept. 2: No service between Bedford-Nostrand and Hoyt-Schermerhorn.

The MTA has said it would provide frequent shuttle bus service to replace the trains during the closure.

The alternative, according to agency plans, would result in shutdowns across 40 weekends, plus additional overnight outages at an extra cost of $20 million-$50 million to the $621 million project. And even if they spread out the work, officials say, the G train would only be able to run a limited schedule at slower speeds, changes that also frequently enrage straphangers.

“The MTA is committed to delivering a world-class subway system for G train customers . . . and appreciates the perspectives of local leaders in Brooklyn and Queens on ways to improve the transit experience,” said agency spokesman Eugene Resnick.