The defendant was charged with careless driving following a three-vehicle collision on January 26, 2019, on Stevenson Road South in Oshawa.
The defendant's vehicle struck another vehicle from behind, causing a chain-reaction collision.
The defendant claimed brake failure and black ice conditions, but the court found the road was dry and the vehicle had no mechanical defects.
The court found the defendant was either traveling too fast or braked too late, or both, and rejected her due diligence defence.
The defendant was convicted of careless driving.