When siting playgrounds, which factor is NOT essential for safety?

In considering the safety of playgrounds, the correct choice highlights the significance of site selection concerning high-traffic roads. Proximity to such roads is indeed not essential for safety; in fact, it poses several hazards for children, as heavy vehicle traffic can create dangerous conditions. Playgrounds should be located away from high-traffic areas to minimize risks of accidents or injuries.

The other options, such as providing protection from circulation, ensuring clear entry and exit points, and implementing substantial noise buffering, are all essential safety factors. Protection from circulation helps to create a safe environment by preventing uncontrolled access from vehicles or pedestrians. Clear entry and exit points are crucial for ensuring that children can enter and exit the playground safely without confusion or obstacles. Substantial noise buffering can protect children from the auditory distractions of nearby traffic, allowing for a more focused and comfortable play experience. Thus, these aspects are vital in any responsible playground siting strategy.