Credit: Steve on Flickr

G train riders may have to wait an additional two years for long-promised signal upgrades that would speed up service. The $624 million project aims to replace the line’s 1930s-era signal system with communications-based train control (CBTC). Work is scheduled to be completed north of Hoyt-Schermerhorn by the end of 2027, and between Hoyt-Schermerhorn and Church Avenue by 2028. However, the upgraded system won’t be activated until 2029, due to delays in installing 5G radio technology in subway cars—a requirement for CBTC to function across both trains and tracks, agency officials said during an MTA committee meeting Monday.

The delay is especially frustrating for daily G train riders, who endured a six-week shutdown last summer and now face additional week

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