What is the speed limit for interstate highways?

The speed limit for interstate highways varies by state and certain circumstances; however, a general maximum speed limit found on many interstates is 70 mph. This limit allows for efficient travel while maintaining safety on high-capacity roadways designed for longer distances and higher speeds.

While some states may allow higher limits such as 75 mph on certain stretches of interstate, 70 mph is commonly established as a baseline for many routes. It's essential for drivers to be aware of posted signs, as local regulations and road conditions can influence speed limits.

Understanding these limits helps drivers navigate and adjust their speed appropriately to ensure both safety and compliance with the law.