An Air Canada Boeing 787 bound for Zurich was cleared for departure on that parallel runway and began its take-off roll. The jet exited on to a taxiway at the end of the runway and a tower controller gave the pilots instructions to hold short of a parallel runway. OTTAWA—A U.S. regional jet, same runways at Pearson — and a quick radio warning from an air traffic controller to prevent a close call. At the time, the Air Canada jet was halfway down the parallel runway, accelerating quickly for take-off, Tasker said. Even if the regional jet entered the parallel runway, the Air Canada flight was safely airborne by that point, he said.

Source: thestar August 15, 2017 21:56 UTC