Some drivers do their best to always travel at the maximum speed limit. They believe they are good as long as they do not surpass that specific figure.
That is the wrong way to look at speed limits. They are maximum permittable speeds, not speeds to aim for. And in some circumstances, driving at the speed would be wholly inappropriate.
Drivers should adjust their speed for the conditions
The police and local authorities sometimes reduce the speed limit of a stretch of road temporarily. For example, they might reduce the limit of a road on a day when there is an event taking place and the roadside will be full of parked cars. Or on a day when road crews are cutting the trees that line that particular stretch.
Yet, there are plenty of other times when a lower speed would be appropriate, but there will be no signs in place to enforce this. The weather might be one cause. Driving at the maximum speed limit could be incredibly dangerous if the road has ice, snow or standing water, or if you get caught in thick fog or a torrential downpour which reduces visibility.
Heavy traffic would be another reason to slow down. So too would a boisterous group of school kids walking along the sidewalk on their way to sports practice, or a pack of cyclists out for their Sunday club ride.
Drivers must drive at an appropriate speed for the conditions, even if that happens to be far below the maximum speed on the road sign. If a driver does not do this, they should expect to be held accountable for the compensation anyone they injure needs.