A truck driver was uninjured yesterday morning when his tractor trailer overturned on I-84 in the town of Southeast.  The accident happened around 1:30 Tuesday morning.  The driver, 34-year-old Aabdirizak Muse of Ohio, told New York State Police that his front tire failed.  The truck went off the road and struck a guide rail before overturning by exit 20.  The Department of Environmental Conservation responded to clean up a fuel spill.  Part of the highway was closed through the morning commute and caused traffic to back up into Connecticut.