Tough Question: Who Should Go First?

At first glance, this looks like a simple traffic situation, but in reality, it reflects something much deeper about our values as human beings.
You have four vehicles at an intersection: a fire engine, an ambulance, a police car, and a presidential car.
So, who should go first?
According to traffic laws in most countries, emergency vehicles are given priority. But beyond the law, there is a moral answer.
The ambulance should go first, because inside there may be someone fighting for their life. Every second matters. A small delay can mean the difference between life and death.