Kids and adults could barely take their eyes off the road.

Race cars zooming by 150 miles per hour captivated the audience at the 2016 Firestone Grand Prix of St. Petersburg.

Evan Doel brought his 3-year-old son Connor to the last of the three day event.

"Was that awesome or what?" He asked Connor.

"I’m a huge racing fan, trying to pass it on to my son."

While the rubber on the course was the main attraction, the speed zone with rides, food and games was also a huge hit.

Something you’ll notice was different this year, a heightened level of security, organizers adding things like metal detectors to keep attendees safe.

"Maybe the lines are a little bit longer, but there’s a lot people coming in the gates. I think our fans respect and are used to coming to big sporting events these days," said Kim Green, promoter of the event and owner of Green Savoree Racing Promotions.

Along with the metal detectors, more barriers were added between fans and the course for added safety from debris or crashes.

"St. Pete does a good job of putting the fence, you know, barricades up, really trying to give us space behind the wall, but at the same time not taking away from what motor sports is and being able to be right there," Doel added.

Organizers believe around 160,000 people showed up to the event, cheering on the racers.