Send this page to someone via emailThe Calgary police traffic unit is investigating a fatal crash on Barlow Trail that left one person dead early Thursday morning. Police say officers were called out to the intersection of Barlow Trail and 7 Avenue Northeast around 3:45 a.m. for reports of a single-vehicle crash. View image in full screen The Calgary Police Department says speed is believed to be a factor in a crash on Barlow Trail, N.E., early Thursday morning that killed a man in his 20s. Story continues below advertisementOfficers shut down Barlow Trail in both directions from 4 Avenue to 16 Avenue Northeast during their investigation. View image in full screen Investigators say speed is believed to be a factor in the fatal crash, while possible impairment by drugs and alcohol, remains under investigation.