Final answer:
The height limit for children to ride without a booster seat or sit in the front of the car is approximately 54 inches (137 cm).
Step-by-step explanation:
The height limit for children to be without a booster seat or sit in the front of the car varies depending on the state and country. However, a general guideline is that children should be at least 54 inches (137 cm) tall before they can ride without a booster seat or sit in the front of the car. This is because the seat belt in a car is designed to properly fit an adult, and children who are shorter may not be properly protected by the seat belt in the event of a crash.