Traffic was backed up for more than an hour Friday evening around 7:00pm on Lantana Road due to a two car head-on collision. According to THP, a 2004 Ford Mustang being driven by 31-year-old Josh Graham of Spencer was travelling east on Lantana (Hwy 101), crossed the centerline and crashed head-on into a 2015 Jeep Latitude being driven by 36-year-old Heather Winningham of Crossville.  Both drivers were flown out by Lifestar Helicopter to UT Medical Center.  Their conditions are not know at this time.  According to the THP report regarding Josh Graham, drugs or alcohol is suspected as a contributor to the wreck and charges are pending.