When multiple emergency vehicles are responding along the same route, they should travel:

When multiple emergency vehicles are responding along the same route, maintaining a distance of at least 300 to 500 feet (90 to 150 m) apart is crucial for several reasons that enhance safety and operational efficiency.

This distance helps ensure that emergency vehicles can maneuver effectively without interfering with one another, allowing each unit to respond to incidents or navigate through traffic safely. It also provides enough space for the drivers to maintain clear visibility of the road and the actions of other units, which is essential for avoiding collisions. Moreover, this distance helps in maintaining a clear path for other vehicles on the road, reducing the likelihood of a backup or traffic pile-up, thereby enhancing overall scene safety.

In contrast, larger gaps, such as those suggested by other choices, could create delays in response times, which is critical in emergency situations. Similarly, shorter distances could lead to increased risks of accidents between the vehicles. Hence, a distance of 300 to 500 feet is considered a suitable balance between safety and operational response efficiency in emergency response scenarios.