Full train service is coming by the end of the month to the new Grand Central Madison station for the Long Island Rail Road, the MTA announced Wednesday. 

Beginning Monday, Feb. 27, LIRR commuter trains from points east of the Jamaica station will stop at the station, which is located 17 stories underground below Grand Central Terminal. 

“This is transformational,” Janno Lieber, the MTA’s chief executive, said Wednesday at a news conference. “More convenient travel that brings Long Island and the city closer together.”

Bringing full service to the station will mean the LIRR has 271 additional trains per day, a 41% increase in service and the largest such service change in the railroad’s history, Lieber said.

The MTA’s train schedule website now includes itineraries for trains going from Jamaica to Grand Central Madison starting February 27 — a 19-minute trip. https://new.mta.info/schedules  

The MTA said 296 trains will serve Grand Central Madison per day. A total of 936 LIRR trains will run per day across the system, up from 665 per day, according to the MTA. 

According to the MTA’s website, peak service is increasing on many branches, but those trains will now be split between Penn Station and Grand Central, and Atlantic Terminal will also see 36 more trains per day.

“Timed connections” will also be ending at Jamaica, according to the MTA, meaning that connecting trains will no longer be held to wait for each other.

The MTA has specitic details about service changes for individual branches on its website.

Opening the station to more commuters, Lieber said, will not only help bring office life back to Manhattan for Long Island commuters, but provide eastbound rush-hour commuter trains that will help Long Island businesses attract employees from the city.

The Madison station, which features gleaming white hallways, the longest escalators in the transit system, and artwork from Yayoi Kusama and Kiki Smith, finally opened in January after decades of planning and construction. 

Despite the MTA having planned to open the station before the end of last year, an unexpected issue with its emergency smoke ventilation system further delayed it. It officially opened last month, but only with limited service to and from Jamaica.

Federal funds for the project were first secured in the 1990s, when politicians and transit officials predicted completing it within a few years. 

Construction eventually started in 2010, and its initial price tag of $4.4 billion ballooned to more than $11 billion.