WASHINGTON — Investigators said the driver who was killed in the fiery tanker crash on Interstate 95 in Baltimore on Dec. 17 had the required certification to drive a fuel truck and had his medical clearance in order.

Lt. Kevin Ayd with the Maryland Transportation Authority Police said 31-year-old Clinton Lamont Worrell Jr. had valid medical certification and what is known as a “hazmat endorsement,” meaning Worrell had clearance to drive a fuel tanker, as well as having a standard commercial driver’s license.

Ayd said, “Drivers of tankers that carry fuel or any other type of hazardous material, they are under strict guidelines per federal regulations. They really have to keep their stuff together.”

Worrell drove for Carroll Independent Fuel, and Ayd said “The company is saying in their long history, Carroll Fuel has never had a fatality.”

On its website, Carroll Independent Fuel issued a statement about Worrell’s death, and noted that a GoFundMe account had been set up for Worrell’s family.

The number of traffic problems in the D.C. area skyrocketed on Dec. 17 as a result of a blast of wintry mix that morning.

The tanker explosion was caught on video: