How does a grader improve road safety?

A grader improves road safety primarily by leveling the road surface and ensuring proper drainage. This process involves creating a smooth and even road surface that enhances vehicle stability and control. When a road surface is level, it minimizes the risk of accidents caused by uneven terrains, ruts, or potholes that can lead to loss of vehicle control.

Additionally, proper drainage is crucial in preventing water accumulation on roadways, which can create hazardous driving conditions like hydroplaning. By directing water away from the road surface, a grader helps maintain optimal traction for vehicles, thereby reducing the likelihood of accidents during rain or after snowmelt.

The other choices do not directly contribute to improved road safety in the same manner. Compaction of soil can be important for certain construction projects, but it does not specifically address the concerns of surface smoothness or drainage on existing roads. Increasing traffic speed limits is counterproductive to safety, as higher speeds can lead to more severe accidents. Reducing the need for regular maintenance may initially seem beneficial, but without regular upkeep, road conditions can deteriorate, ultimately compromising safety. Therefore, the role of a grader in leveling surfaces and managing drainage is essential for creating and maintaining safe road conditions.