A man who kept driving after his sport-utility vehicle hit a teenage boy as he crossed a District street was sentenced to three years in prison, authorities said Monday.

Vernon Blake, 38, of Suitland was sentenced Monday in D.C. Superior Court in a July 2011 incident in which a boy walking his bike across Alabama Avenue SE at Stanton Road was struck and seriously injured.

Blake, who was driving at least 50 mph — twice the speed limit — hit the boy and then kept driving, according to the U.S. attorney’s office.

Bystanders called 911, authorities said, and police soon caught Blake. After he was stopped, he failed field sobriety tests and his blood alcohol level was above the legal limit.

Blake pleaded guilty to aggravated assault, reckless driving and driving under the influence in January 2011, authorities said.

Authorities said the victim, now 18, was to return to school this week.

Read more: The Post’s crime coverage