When ambulances are readily available from two or more services, your ambulance company may respond to a motor vehicle accident

In the context of responding to emergencies, the correct choice is that the ambulance may respond only upon instruction from a peace officer or a public agency dispatcher. This is because such an instruction is essential to maintain order, ensure the safety of all involved, and coordinate responses among multiple services. Peace officers and public agency dispatchers have the responsibility to assess the situation and determine the most appropriate response, which can involve multiple services to avoid confusion and ensure that the most immediate needs are being met.

When responding to a motor vehicle accident, different ambulance services might be available; therefore, coordination is crucial. This helps to avoid unnecessary competition or overlap that could lead to suboptimal patient care or traffic congestion. Instructions from official authorities help streamline operations, direct resources effectively, and prioritize the safety of both victims and responding personnel.