An Ottawa man is facing impaired driving charges after police say he collided with an OC Transpo bus Monday evening with three times the legal limit of alcohol in his system.

The trial of the 44-year-old women behind the wheel during the 2019 Westboro bus crash began Monday morning with testimony from OC Transpo special constables.

The City of Ottawa is facing 13 civil suits related to last January's devastating bus crash and has received notices of 18 more.

Close to one year after the fatal double-decker bus crash at Westboro station, OC Transpo says an independent safety review of the Transitway is underway and will continue into 2020.

Mayor Jim Watson sat down with Global News for an end-of-year interview last week.

Aissatou Diallo, 42, faces three counts of dangerous driving causing death and 35 counts of dangerous driving causing bodily harm in the deadly collision in Ottawa on Jan. 11, 2019.

The double-decker bus, on an express route from downtown to the west-end suburb of Kanata, slammed into the roof of a shelter, cutting through the right side of its upper deck and crushing a number of seats.

Police and the city both say they have to stay tight-lipped while the Westboro bus crash investigation continues so the probe remains "uncompromised."

According to Coun. Allan Hubley, the change comes due to a request from those involved in the crash and their families.

The interim payments are being made in order to help families immediately to avoid waiting through the litigation process and will be funded by the city's insurer.