A track spokesman announced at 4:55 a.m. ET that the individual had been released.

Names of those treated were not disclosed.

Dillon’s Richard Childress Racing Chevrolet was launched into the catchfence along the frontstretch following contact between several cars, and then was thrown back onto the racing surface. A section of fencing was destroyed and fans were struck by debris.

Dillon’s car, or what was left of it, had barely come to a stop, on its roof, when it was struck by the No. 2 Ford of Brad Keselowski.

Crewmen from race winner Dale Earnhardt Jr.’s Hendrick Motorsports team, stationed just across the infield from the crash scene, quickly rushed to Dillon’s aid.

Moments later, after rescue personnel had arrived on the scene, Dillon scrambled from his mangled car, and after walking away from the crash, took off his helmet and raised his arms in response to cheers from those in the grandstands.

Chitwood said he was proud of the fact "that the fence worked" and "the additional safety enhancements" performed as anticipated.

"We’ll take this situation, we’ll learn from it, we’ll analyze it, and we’ll round up our engineering team and see if there’s any additional things we can learn to get better the next time," he said.

It was the second time in three years that a car had impacted the fencing that separates the racing surface from the grandstands on the frontstrech at Daytona. In February of 2013, driver Kyle Larson‘s car also struck the fencing. More than a dozen fans were transported to area hospitals after being hit by debris.

"Obviously through the last couple years, we’ve learned a lot, whether it’s fencing or the facility itself in terms of enhancements," Chitwood said. "One of the elements of the project of Daytona Rising was no longer having fans or individuals on Rim Road and closing off the grandstands on the front row, so those were in the new sections, and that was what was in place today, and I think it did a very good job."

Dale Earnhardt Jr. on returning to Daytona after the crash that killed his father: "I could tell my buddies were like, ‘Man, what’s going on? How is it going to be? What’s the deal?’ So, as soon as we got there, we drove around to Turns 3 and 4, right where dad hit the wall and lost his life. And, we stopped, and everybody got out and I just walked around a little bit by myself. I just spent some time there seeing how I would feel. I didn’t want to fall apart in front of all of my guys and everybody in the race and the garage. It was good. I was like, ‘Man, dad loved this place and I’m still at peace with this place. I still love being here and looking forward to racing here many more years."

Steve Letarte: "Have you ever gone back and relived or re-watched that race in July [that you won]?"

Earnhardt Jr.: "Oh yeah, tons of times."

Earnhardt Jr. on his Daytona win: "I was wide open the whole time. Panicking. How many laps are left? Are we going to have enough laps left? Just full-throttle panicking."

Earnhardt Jr.: "I think that win right there made the whole company feel like they could move on and that things were going to be alright. We could be a strong team… you just don’t see victory celebrations like this every week. It was special."

Earnhardt Jr. while watching his first interview after his win: "[Laughs] I sound like an idiot. Once you drive in there and you get out of the car, and you’re in Victory Lane, I think the emotion and everything sort of sucks me in."

Earnhardt Jr.: "I know that a lot of people took pleasure in how that worked out. And if they couldn’t have won the race, I heard that 100 times in the garage the next day. ‘If I couldn’t have won that race, man, I wouldn’t have wanted it any other way."