Final answer:
A red arrow indicates that the turning lane is the only lane required to stop. Traffic rules like this are designed to maintain safety, although emergencies might challenge strict adherence to these laws.
Step-by-step explanation:
If you pull up to a red arrow, the turning lane is the only lane that should stop. This rule is fundamental to driving etiquette and traffic laws, which dictate that a red arrow indicates that vehicles in the turning lane must come to a complete stop, while other lanes might continue if their traffic signals permit. Traffic rules are created to ensure the safety of all road users. However, in rare emergency situations, such as when a pregnant woman is about to give birth in the backseat of a vehicle, drivers might face ethical dilemmas about whether to adhere to traffic laws or act in the best interest of the person requiring urgent medical care.