Three teenagers died and a fourth was critically hurt in a crash on Staten Island Sunday night, the NYPD said.

A 16-year-old boy was driving a 2018 Ford Mustang east on Hylan Boulevard in Tottenville at an “unsafe speed” around 8:50 p.m. on Sunday, when he swerved from the left lane into the right lane, a preliminary NYPD investigation found.

As the teen swerved, a 47-year-old man driving a 2017 GMC Yukon west on the boulevard made a left turn onto southbound Richard Avenue, hitting the driver’s side of the Ford Mustang, police said.

​Police say the front of the Ford Mustang mounted the sidewalk on the boulevard, uprooted a small tree, hit a telephone pole and split into two pieces before it came to a stop.

The 15-year-old boy and 15-year-old girl, identified by police as Staten Island residents Jesie Gil and Ashley Rodriguez, were ejected from the car and pronounced dead at the scene, the NYPD said.

A 16-year-old girl who had been sitting in the front passenger seat, identified by police as Fernanda Gil, also of Staten Island, was pronounced dead at Staten Island University Hospital North, the department said.

According to police, the 16-year-old Ford Mustang driver was taken to the same hospital, where he was listed in critical but stable condition.

Officials say at least some of the passengers were not wearing a seatbelt.

The GMC Yukon driver and his four passengers — a 44-year-old woman, a 23-year-old man, a 19-year-old woman and an 11-year-old girl — were all hospitalized with minor injuries, according to police.

The GMC Yukon driver was later taken into custody for driving with a suspended license. Charges against him were pending as of Monday morning, the NYPD said.

There have been 123 traffic deaths citywide so far in 2022, according to transit advocacy group Transportation Alternatives​.

"We are absolutely heartbroken that three young lives have been taken by deadly traffic violence," said Rose Uscianowski, a Staten Island and South Brooklyn organizer for Transportation Alternatives, in a statement. "These three deserved a bright future. Now, like 120 other New Yorkers this year, their lives have been lost too soon as a result of a fatal car crash. This incident is devastating for all of us on Staten Island and New Yorkers citywide."

It was not immediately clear how fast the 16-year-old boy was driving when the crash happened, and police did not say whether he faces any charges. The city lowered the speed limit on Hylan Boulevard to 30 miles per hour last year.

The city's Department of Transportation Commissioner, Ydanis Rodriguez, said there are several speed cameras on the street, but because it was Sunday, they were turned off. That will be changing starting Aug. 1 after state lawmakers gave the city the authority to keep speed cameras on 24 hours a day. Previously, state law mandated cameras be turned off between 10 p.m. and 6 a.m. weekdays and all day on weekends.

"This crash took place on a Sunday, when speed safety cameras were turned off. When cameras are off, there is an open invitation to speed — and speeding kills," Uscianowski said. "On Aug. 1, speed safety cameras are finally going to be on every hour of every day, and we will have an effective tool to prevent these horrific crashes from happening."

As of May 2021, there had been 21 traffic fatalities along the boulevard since 2014.

"Hylan Boulevard is Staten Island's boulevard of death," Uscianowski said. "Basic safety reforms should have been prioritized here years ago. Projects cannot just be expedited or implemented after tragedies."