Practice question

What safety treatment is mandatory for the approach end of temporary concrete barrier (K-Rail) exposed to oncoming traffic within the clear zone?

  1. An approved crash cushion or impact attenuator.
  2. A stack of four un-ballasted traffic cones.
  3. A high-intensity red flashing warning beacon.
  4. A reflective orange vinyl wrap around the end segment.

Answer: A — An approved crash cushion or impact attenuator.

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