What does a road blockage generally indicate?

A road blockage generally indicates an obstruction preventing vehicle passage. When there is a blockage on the road, it means that something, such as an accident, construction, debris, or a fallen tree, is hindering the flow of traffic, making it impossible for vehicles to pass through that section of the road. This significant restriction can lead to delays, detours, and impacts on traffic patterns as drivers are forced to find alternative routes.

In contrast, the other options refer to different traffic scenarios. For example, smooth traffic flow would suggest there are no obstructions and vehicles can navigate without interruption, while a dangerous intersection relates to road design or traffic signals rather than an obstruction. Scheduled maintenance work might temporarily close a lane or road but doesn't necessarily imply a complete blockage. Therefore, the essence of a road blockage is about obstruction, making the selected answer accurate in this context.