What could indicate inadequate buffer space in a work zone?

Frequent accidents in a work zone can be a significant indicator of inadequate buffer space. Buffer space is crucial for providing a safety zone between traffic and work activities. When this space is insufficient, vehicles may be unable to stop in time to avoid collisions as they approach a construction area. This leads to a higher likelihood of accidents, which can be attributed to the lack of distance and the inability of motorists to react appropriately to hazards or changes in traffic flow. In a safe work zone, there should be enough buffer space to allow drivers to slow down and navigate through the area safely, minimizing the risk of accidents.

The other options do not indicate inadequate buffer space. Clear sight of construction activities suggests that drivers can see what is happening, which is not inherently a sign of inadequate buffer space. High-speed traffic without issues would indicate that the traffic is flowing smoothly and would not suggest a problem with the buffer. Lastly, the presence of traffic signals typically indicates controlled traffic flow, which would not be a sign of inadequate buffer space in a work zone.