Four vehicles approach a four-way stop intersection under the following conditions:
• Vehicle A: An emergency vehicle displaying active flashing lights and sounding a siren, approaching from the North.
• Vehicle B: A sedan that arrived first at the West entrance and came to a complete stop.
• Vehicle C: A delivery truck that arrived second at the East entrance, intending to proceed straight.
• Vehicle D: A compact car that arrived second at the South entrance simultaneously with Vehicle C, intending to turn left.
Arrange the vehicles in the correct order in which they have the right-of-way to proceed through the intersection (from first to last).
- 1Vehicle A (Emergency vehicle approaching from the North with lights and siren)
- 2Vehicle B (Sedan at the West entrance that arrived and stopped first)
- 3Vehicle C (Delivery truck at the East entrance going straight)
- 4Vehicle D (Compact car at the South entrance turning left)
Answer
The correct order of movement through the intersection is Vehicle A first, followed by Vehicle B, then Vehicle C, and finally Vehicle D.
Vehicle A moves first because active emergency vehicles take complete precedence over regular stop-sign procedures. Vehicle B proceeds second because it arrived and stopped at the four-way stop prior to Vehicles C and D. Between Vehicles C and D, which arrived simultaneously, Vehicle C proceeds third because it is traveling straight while Vehicle D is turning left. Vehicle D must yield and proceeds last.
Step-by-Step Solution
Key Concept
Multi-Way Stop Right-of-Way Hierarchy and Emergency Vehicle Priority