"Touchdown rule
Utah uses what's known as the touchdown rule. That means if your car's front bumper crosses into the intersection at any point during the yellow light, you're in the intersection legally. It's one of the reasons why UDOT uses an all-red clearance interval, meaning lights in all directions are red for about two seconds."
" In certain states, the law prohibits drivers from entering an intersection once the signal has changed to yellow. However, in Utah, a solid yellow light is just a warning that signals the light is about to turn to red. Essentially, you are allowed to enter an intersection when the light is yellow, just not after it turns to red."