The shaken bus driver who was operating the B15 when a violent gangbanger shot and killed an innocent Brooklyn man said the shooting could easily have been a “massacre” and that she sped off when the shooter tried to get back on her bus.

“It was a horrible noise. You hear the shots going off and then the ringing in your ears,” said the young female MTA driver, who asked her name not be published due to her fear of the gangs.

“People were trying to shield themselves. The passengers were screaming … One lady kept screaming and screaming – she was sitting behind the man who was shot.”

Angel Rojas, 41, was taking the bus home to visit his family between his two jobs when gang member Kahton Anderson, 14, opened fire at a rival and hit Rojas in the back of the head.

The driver – who has driven that route for about a year – said she recognized Rojas as a regular passenger.

“It could have been a whole massacre on that bus. There were shots all around. A lot of people could have died,” she said, adding that there were about 20 passengers when the shots rang out.

After the shooting Anderson tried to get back on the bus – but the driver stopped him by speeding off instead.

“After the shots I just drove. [The shooter) tried to come back on the bus. I tried to get away quick. The first thing I thought was, ‘Get away quick,” she said at her Brooklyn home.

“This is the last thing you expect at the end of the day. You expect to go home and cook dinner,” said the shaken driver.

“I’m still I’m shock. If you’re a human being you’d still be in shock. This is going to be with me for a long time.”

Anderson has been charged with murder.