The new Second Avenue subway stations finally opened to the public on Sunday.

Eager commuters packed into a northbound Q train to go to the 76th, 86th and 96th street stations for the first time.

The subway line has been in the making for decades, and the three new stations -- Phase I of the project -- only account for a quarter of the planned 8.5-mile track uptown.

Scroll down to see pictures from the opening day.

Passengers ride a northbound Q train during the
Passengers ride a northbound Q train during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
A child looks out the window of a
A child looks out the window of a downtown Q train at the Second Avenue subway's 86th Street station on the first day that the new line opened to the public, Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Passengers ride a northbound Q train during the
Passengers ride a northbound Q train during the first day of service on the Second Avenue subway in Sunday, Jan. 1, 2017. (Credit: Charles Eckert)

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People walk through the Second Avenue subway's 72nd
People walk through the Second Avenue subway's 72nd Street station on the first day that the new line opened to the public, Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Passengers ride a northbound Q train during the
Passengers ride a northbound Q train during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Passengers cheer as they ride a northbound Q
Passengers cheer as they ride a northbound Q train during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Timothy Hardial cheers as he exits a northbound
Timothy Hardial cheers as he exits a northbound Q train at 96th Street during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Commuters packed into a northbound Q train during
Commuters packed into a northbound Q train during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Vincent Barone)

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A girl blows her horn at the 96th
A girl blows her horn at the 96th Street station during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Harlem residents Frankie Santiago and Enisa DeJesus share
Harlem residents Frankie Santiago and Enisa DeJesus share a kiss as they wait for the doors to open on a northbound Q train during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
People look at artwork by Chuck Close in
People look at artwork by Chuck Close in the Second Avenue subway's 86th Street station on the first day that the new line opened to the public, Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
Passengers ride a northbound Q train during the
Passengers ride a northbound Q train during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Charles Eckert)
People explore the new 96th Street station during
People explore the new 96th Street station during the first day of service on the Second Avenue subway on Sunday, Jan. 1, 2017. (Credit: Vincent Barone)

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