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Difficulty: MediumRight-of-Way Rules at Intersections

An active ambulance with flashing lights and siren activated approaches a four-way stop intersection. At the same time, Vehicle A (which arrived at the intersection first) is waiting to proceed straight, and Vehicle B (which arrived second) is waiting to make a left turn. In what order must these vehicles proceed through the intersection safely?

  1. 1Ambulance with active lights and sirens
  2. 2Vehicle A (going straight, arrived first)
  3. 3Vehicle B (turning left, arrived second)

Answer

The correct sequence of movement is: first the Ambulance with active lights and sirens, second Vehicle A, and third Vehicle B.
Emergency vehicles displaying active flashing lights and sounding a siren override standard intersection controls and always have top right-of-way priority. Once the intersection is clear of emergency traffic, standard four-way stop arrival rules determine precedence, meaning Vehicle A (first arrival) proceeds before Vehicle B (second arrival).

Step-by-Step Solution

1
Identify top-priority traffic (Emergency Vehicles)
The active emergency ambulance proceeds first.
State traffic laws mandate that all vehicles yield immediate right-of-way to emergency vehicles operating sirens and visual flashing lights.
2
Apply multi-way stop sign rules to remaining vehicles
Vehicle A proceeds second, followed by Vehicle B.
Under standard four-way stop rules, vehicles proceed in the order they arrived ('first to arrive, first to proceed'). Vehicle A arrived before Vehicle B.

Key Concept

Right-of-Way Precedence involving Emergency Vehicles and Multi-Way Stop Arrival Sequence
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Topics

Right-of-Way Rules at Intersections

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