What is the speed limit on primary and secondary state and federal highways in Tennessee?

The speed limit on primary and secondary state and federal highways in Tennessee is set at 55 miles per hour. This limit is established to ensure safety on roadways that can vary significantly in traffic volume and driver behavior. The 55 m.p.h. limit helps to control speed in areas that may have more merges, intersections, and potential hazards, making it safer for all road users.

While some highways and certain routes may allow for higher speed limits, such as 70 m.p.h. on specific interstates, the general default speed limit on most primary and secondary highways maintains a safer threshold conducive to various driving conditions that can be influenced by factors like weather and road quality.