The NHTSA provides comprehensive guidelines for the use of car seats based on a child's age, weight, and height. Here are the key recommendations:
Rear-facing car seats: For infants and toddlers up to the age of 2 or until they reach the maximum weight and height limits set by the car seat manufacturer. Forward-facing car seats: For children who have outgrown their rear-facing car seats, usually between the ages of 2 and 7, until they reach the maximum weight and height limits set by the car seat manufacturer. Booster seats: For children who have outgrown their forward-facing car seats, typically between the ages of 4 and 12, until they are tall enough to use the seat belt properly. Seat belts: For children who are at least 8 years old or 4'9" tall, and can sit comfortably with the seat belt fitting snugly across their upper thighs and chest.
