What is the average speed limit

Except certain designated highways. North Carolina. North Dakota. Northern Mariana Islands. Oklahoma 4. Limit of 70 MPH on specific segments based on an engineering and traffic investigation.

Rhode Island 2. South Carolina. South Dakota. Although the average speed on some U. It aggregates, anonymously, the actual speeds that millions of GPS-enabled drivers have traveled over the last two years to provide the most accurate view of historic speeds available. Data were organized to show the average speeds on interstate highways and to reflect only free flow speed data, or average speeds when there is no traffic present. When compared to a database of posted speed limits, the results indicate that the average U.

Across all interstate highways, Mississippi has the fastest roads, with average speeds of just over 70 MPH and posted speed limits ranging from MPH.

Where is America's Autobahn? Our fastest road is on I in Utah and Nevada, with speeds averaging Seven of the top 15 states with the fastest highways are in that area. After Washington D. The Speed Profiles database currently covers 85, miles of interstate highways in the United States.

To see lists of the top 20 states with the highest MPH averages, maps of the fastest and slowest highways in the U.

View More. Thank You Thanks for subscribing. Check your in-box to get started. Sign Up More Info. We notice you're using an ad blocker. Please consider allowing Autoblog. A speed limit is the maximum legal speed you can travel on a road under ideal conditions. You may drive reasonably slower than the posted speed, but it is illegal to drive any faster.

Speed limit signs typically mark maximum speed limits as well as minimum speed limits. All drivers must share the roadways, and to do so safely requires mutual consideration, cooperation, and responsible judgment. Those drivers who insist on travelling under the minimum speed limit may hold up traffic so that a procession of cars ends up behind the slow driver.