Final answer:
The incorrect statement about passing vehicles is that one should pass off the paved shoulder; this is generally against the law and unsafe. The other practices mentioned are correct and should be followed for safe passing on the road.
Step-by-step explanation:
The statement that is not correct about passing vehicles is C) Pass off the paved shoulder and never pass off the unpaved shoulder. Generally, it is illegal and unsafe to pass other vehicles off the paved shoulder of the road. The correct practices for passing vehicles include: A) Only pass one vehicle at a time; B) At a speed of 55 mph, you need about 10 seconds to pass safely; D) On multi-lane roads, the left-most lane is often designated for passing, staying aware of local compliance with highway traffic laws.
When driving at 55 mph, a driver requires about 10 seconds to pass another vehicle safely. This allows enough time to overtake the vehicle and return to the lane without causing a hazard. Additionally, it's essential to pass one vehicle at a time to maintain control and safety on the road. Multi-lane roads typically reserve the left-most lane for passing, but regulations can vary, so drivers should always follow local traffic laws.