Why is the E-5 barrier only used in the over run?

Why is the E-5 barrier only used in the over run?

• A. Because it is cheaper
• B. Because it is safer to operate on the runway centerline
• C. Due to the extensive amount of time it takes to reset the barrier
• D. Because it is used in all runway areas

Answer: (C)

The main point is that the E-5 barrier is designed for strong, lasting obstruction but takes a long time to reset. That makes it best suited for the runway overrun, where the barrier can do its job during the incident and not need to be back in service immediately for active operations. In active runway sections, you need barriers that can be quickly rearmed and redeployed, which the E-5 isn’t designed to do. The option that cites the long reset time explains why this barrier is restricted to the overrun area. The other reasons—cost, operating safety on the centerline, or use in all areas—don’t address the practical limitation of how long it takes to reset the device.

The main point is that the E-5 barrier is designed for strong, lasting obstruction but takes a long time to reset. That makes it best suited for the runway overrun, where the barrier can do its job during the incident and not need to be back in service immediately for active operations. In active runway sections, you need barriers that can be quickly rearmed and redeployed, which the E-5 isn’t designed to do. The option that cites the long reset time explains why this barrier is restricted to the overrun area. The other reasons—cost, operating safety on the centerline, or use in all areas—don’t address the practical limitation of how long it takes to reset the device.