South Carolina Speed Control practice

• A.Driving below the minimum speed limit can help prevent accidents on highways.✓
• B.The maximum un-posted speed limit in a residential area is 30 mph.
• C.The legal maximum speed limit is based on ideal traffic conditions.
• D.The maximum un-posted speed limit in a rural area is 55 mph except when a higher limit is allowed by federal law.

Why: Driving below the minimum speed limit is dangerous because it disrupts the flow of traffic and increases the risk of rear-end collisions. While speed limits are set for ideal conditions, driving too slowly can be just as hazardous as speeding.

• A.Tailgating in the rain
• B.Using high-beam headlights in the rain
• C.Applying the brakes on a wet road
• D.Moving over the surface of water on a wet road✓

Why: Hydroplaning occurs when your tires lose contact with the road and ride on a thin layer of water. As the manual states, this physical phenomenon is similar to the action of water skis.