Final answer:
Ignoring a stop sign and continuing to drive indicates that the driver is breaking the traffic rules, which is not the safe or legal action to follow at such traffic controls.
Step-by-step explanation:
If a driver ignores a stop sign and continues driving east at a constant speed, the driver's behavior is Breaking the traffic rules. Stop signs are legally binding traffic controls that require each vehicle to come to a complete stop before proceeding. Ignoring them and continuing to travel without stopping is not only against the law but also jeopardizes the safety of the driver and others on the road. A traffic signal, as another form of traffic control, similarly requires that vehicles abide by its indications, such as stopping at a red light, which also applies to stop signs, ensuring vehicles do not dangerously speed through intersections. Therefore, the proper behavior at a stop sign is to come to a full stop, look for other traffic, and safely proceed when it's clear.