Posted: Apr 07, 2021 1:56 PM ET | Last Updated: April 7 Three passengers died and several more were injured when this double-decker OC Transpo bus struck a steel awning at Westboro station on the afternoon of Jan. 11, 2019.(Justin Tang/Canadian Press) Testimony from an OC Transpo driver and supervisor during the Westboro bus crash trial has raised questions about the consistency of training at Ottawa's transit agency, especially when it comes to emergency braking. Aissatou Diallo, who was behind the wheel of the double-decker bus involved in the fatal 2019 collision, has pleaded not guilty to all 38 dangerous driving charges against her, including three counts of dangerous driving causing death.