According to the Utah government's Drivers Handbook[0] (printed page 27, or PDF page 36), they recommend a 2 second distance on clear dry roads: following dist

According to the Utah government's Drivers Handbook[0] (printed page 27, or PDF page 36), they recommend a 2 second distance on clear dry roads: following distance Watch when the rear of the vehi- cle ahead passes a sign, pole, or any other fixed point. Count the seconds it takes you to reach the same point (one-thousand-one, one-thousand-two.) You are following too close if you pass that point before counting two seconds. Slow down and check your new following interval. Repeat until you are following no closer than two seconds. Always increase your following distance on slick roads, when following large vehicles, motorcycles, or vehicles pulling a trailer, at night, in fog, in bad weather and when following vehicles that stop at railroad crossings (transit buses, school buses or vehicles carrying dangerous mate- rial.) [0] https://dld.utah.gov/wp-content/uploads/sites/17/2022/01/Driver-Handbook-2021-2022.pdf https://dld.utah.gov/wp-content/uploads/sites/17/2022/01/Dri...