Colorado vs Nebraska

Colorado and Nebraska build their laws the same way at the bottom and separate by a single year at the top. Both require rear-facing until age 2 and a forward-facing seat after that, so the infant and toddler rules are effectively the same on either side of the line. The difference is how long the later stages last. Colorado, under a law effective January 1, 2025, keeps a child in a car seat or booster through age 8 and in the back seat through age 8, with the seat belt allowed only from age 9. Nebraska uses age 8 for both the booster and the back seat. That one-year edge on each rule makes Colorado the stricter state, though the gap is narrow.

Both states require all children up to age 2 to ride rear-facing until they outgrow the seat, and both then require a forward-facing child restraint. Nebraska words it as rear-facing up to age 2, then a restraint up to age 8; Colorado words it as rear-facing under 2, then forward-facing. For a family with a baby or toddler, the two laws are interchangeable. Both also fall short of the American Academy of Pediatrics guidance to keep a child rear-facing as long as the seat allows, often past age 2.

Colorado keeps a child in a car seat or booster through age 8 and does not allow a seat belt until age 9, and it requires the back seat through age 8. Nebraska releases a child to a seat belt at age 8 and requires the back seat only up to age 8. The practical effect shows up for an 8-year-old: in Colorado that child still rides in a booster, in the back, while in Nebraska they may move to the seat belt. It is a one-year difference on each rule rather than a wholesale gap, since both states already protect children well into the school years.

The law that applies is the law of the state you are physically driving in. Colorado and Nebraska meet on I-76 and I-80 between Denver, Sterling, and the Nebraska Panhandle, and along US 6 and US 34. To stay legal across the whole trip, follow Colorado's slightly stricter rule: keep a child in a booster and in the back seat through age 8, moving to the seat belt only at age 9. A family moving from Nebraska to Colorado will find the early stages familiar and only needs to add one year to the booster and back-seat stages.