The school bus collided with a car at the intersection of Milton and Navan roads at about 2 p.m., Ottawa police said in a media release Friday.
No one was injured.
There were no children on the bus at the time, police said, but the driver was en route to pick up children at a school to take them home for the day.
The driver, a 45-year-old woman, was charged with impaired driving.
She is scheduled to appear in court on Jan. 29.