Which of the following statements about speed limits for cars in NC is correct?

In North Carolina, the standard speed limit for vehicles traveling on highways outside of city limits is indeed 55 mph unless otherwise indicated by posted signs. This speed limit applies to most highways and is intended to provide a consistent regulation that drivers can expect.

Additionally, the speed limit within city limits is typically set at 25 mph; however, it's essential to be able to adjust for any posted signs that may indicate a different limit. While some might consider the statement regarding city speed limits, the focus of the question is on the broader context of speed limits.

Because the specified speed limit outside of a city is an established rule in North Carolina traffic law, selecting that option is valid and reflects an accurate understanding of the state's traffic regulations. It’s important for drivers to familiarize themselves with these limits to ensure compliance and enhance safety on the roads.