Ontario Provincial Police tweeted Wednesday that a person driving 120 miles per hour on Highway 404 explained that he was going with the “flow of traffic.” The driver has now been charged with stunt driving, no insurance, failure to display two plates and improper use of busy vehicle lanes, police said. The speed limit on most Ontario highways is 110 kilometers per hour. As a general rule, drivers are advised to drive at the same speed as the traffic around them without exceeding the speed limit.