Southbound traffic on Interstate 75 in Pasco County is shut down this morning after a fiery crash involving a semitrailer and dump truck near State Road 56.
Neither driver was injured, troopers said.
Southbound lanes are expected to remain closed until noon, troopers said.
Motorists will be diverted onto State Road 54 (exit 279). Traffic south of that exit and north of the crash will be diverted back to State Road 54 or southbound on the shoulder to State 56 to exit.
Other motorists should avoid roads in the area.
The Florida Highway Patrol said the crash occurred about 6:30 a.m.
According to investigators, the tractor-trailer was traveling south in the outside lane of I-75 in a construction zone, where it collided with a crash attenuator, troopers said.
The collision caused the truck to partially jackknife and collide with the center median guardrail, troopers said.
Both drivers were able to exit their vehicles before a fire erupted on the tractor-trailer.
The tractor-trailer, operated by Pat Salmon & Sons of Jacksonville, was transporting mail, troopers said.