No, a rear driver is not always liable for a rear-end collision. Many states have a presumption that holds a rear driver liable unless they are able to prove otherwise, since each driver is expected to maintain a safe following distance from the car in front of them. However, the front driver may be liable in some situations, such as stopping to make a turn without using the turn signal, failing to pull over when the car breaks down, or failing to repair faulty brake lights.