Route Description
The South Dakota section of Interstate 29 is defined in South Dakota Consolidated Laws ยง 31-4-152. All of I-29 in South Dakota is included in the National Highway System, a system of highways important to the nation's defense, economy, and mobility. Average daily traffic volume on I-29 in South Dakota is relatively low by interstate highway standards. Most segments of I-29 outside of Sioux Falls receive between 5,000 and 20,000 vehicles per day, with numbers as high as 50,000 being reported in Sioux Falls.
The speed limit on I-29 in South Dakota is 75 miles per hour (120 km/h) on most segments, but 65 mph (105 km/h) in Sioux Falls from exit 75 to exit 84.
Read more about this topic: Interstate 29 In South Dakota
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