Tracy Morgan -- Doctors Upgrade Condition

Tracy Morgan is showing strong signs of improvement ... so much so that doctors upgraded his condition to fair today.

Tracy's been listed in critical condition ever since the accident on June 7. He's remained hospitalized while recovering from several broken bones ... the worst of which is a fractured femur.

A rep for Tracy says not only is his health improving, but ... "His personality is certainly starting to come back as well."

Morgan's assistant, who was injured in the wreck ... was also upgraded to fair condition, according to the rep.