TALLAHASSEE, Fla. — The Florida Highway Patrol lieutenant who ordered the reopening of a fog- and smoke-shrouded interstate highway shortly before a series of crashes killed 11 people was unaware of the agency’s procedures and had no formal training in opening and reopening roads, a state report said today.

The Florida Department of Law Enforcement report concluded troopers made errors but found no criminal violations.

Highway Patrol Sgt. Bruce Simmons expressed concerns about reopening Interstate 75 in north Florida in January but Lt. John Gourley gave the order because he was worried keeping the highway closed also would be dangerous.

At least a dozen cars, pickup trucks and a van, six semi-trailer trucks and a motorhome collided in north Florida near Gainesville. Some vehicles burst into flames, making it difficult to identify the victims.

Smoke from a wildfire mixed with fog blanketed the highway where it cut through Paynes Prairie State Park.

The victims included five people in a van returning to Kennesaw, Ga., from an Orlando church retreat.