Xuelin Tian (IMAGE) Concordia University Caption Xuelin Tian: "Traffic congestion levels decreased by 69 per cent in Toronto and by 75 per cent in Montreal, compared to the same week of March in 2019." Credit Concordia University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.