The speedometer from the charter bus involved in Monday’s deadly crash in Queens was stuck at 60 mph — more than twice the speed limit — following its collision with a city bus.

The vehicle operated by the Flushing-based Dahlia Travel and Tours was traveling eastbound on Northern Boulevard in Flushing — where the speed limit is 25 mph — moments before the collision that killed three people, including the Dahlia driver, and injured 16 people.

Officials say a city Q20 bus holding 15 passengers was making a right turn onto Northern Boulevard from Main Street when it was struck by the private bus, causing the city bus to flip around.

MTA Chairman Joe Lhota said investigators were probing whether speed was a factor in the 6:20 a.m. crash in which the private bus also crashed into a Kennedy Fried Chicken, igniting a small fire inside.

Only the Dahlia driver was aboard the bus at the time, police said.

Witness Mark Ramos, 42, said the charter bus “had to have been going really fast … I didn’t hear any brakes or anything.”

Ramos, a superintendent working at a building across the street from the crash, was inside his truck at the time of the collision.

“I heard the impact, it was bad,” he said. “I felt a vibration shake my truck.”

Ramos then ran to the crash site, where he “saw a woman pinned in the back of the city bus.”

“She was screaming and crying, ‘Help me, help me,’” Ramos recalled. “One leg was twisted. It was dark. She was behind the city bus, on the ground.”

The MTA bus driver, who suffered non-life-threatening injuries, was seen sitting on the ground up against a street pole following the crash.

“I saw a guy with his skull cracked open and lots of blood. I saw cuts and bruises all over the place,” Ramos said. “It was chaos with everyone here.”

The city named both Main Street and Northern Boulevard “priority corridors” back in 2015 because of the high rate of injuries on both roads.

Some preliminary changes were made by the city to traffic at that time, but it wasn’t immediately clear if the Department of Transportation had completed the changes or made changes where the roads intersect.

Additional reporting by Danielle Furfaro