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U.S. 63 & H Interchange Boone County

Highway 63 and H

The first portion of the new Route 63 and H interchange project – two new j-turns designed to improve safety and traffic flow – is now open. The j-turns are located between the Discovery Parkway Interchange and Bonne Femme Creek.  They are part of a larger project that includes building an interchange at Route 63 and Route H near the Columbia Regional Airport, constructing new southbound lanes from just north of Route 163 to Route H and using the existing southbound lanes to create an outer road system that will improve safety and access.  

Route 63 and H Interchange Project Nearing Completion

First Portion of New Route 63 Project to Open to Traffic (August 24, 2012)

What is a J-turn?

The "j-turn" is an alternative to traditional roadway intersections on a four-lane highway. Instead of motorists crossing fast-moving lanes of traffic to get to the opposing lanes, drivers at a j-turn intersection turn right in the same direction of traffic, merge into the left lane, and then make a left turn in the direction they intend to travel.

U.S. 63 J-Turn Video

How do you drive a J-Turn?

Previous press releases:

Route 163 Crossover Closing Changed Due to Weather (April 18, 2012)

New Interchange Bridge at U.S. 63 and Route H Takes Shape (Febuary 28, 2012)

Route H Detour Changes for Interchange Construction at U.S. 63 (October 12, 2011)

Roadway Closures Planned for Interchange Construction at U.S. 63 and Route H (August 19, 2011)

Route H to Close at U.S. 63 in Boone County for Interchange Construction (August 10, 2011)

Groundbreaking Planned for New Interchange at U.S. 63 and Route H in Boone County (August 3, 2011)

Interchange Project at U.S. 63 and Route H in Boone County Moves Forward (March 2, 2011)


North J-Turns

North J-Turns


J-Turn South

South J-Turns


J-Turn Aerial

Aerial Map of Project



63andH Groundbreaking Program

Groundbreaking Ceremony Program (August 8, 2011)

Groundbreaking Ceremony Photos (Flickr)

Public Meeting:

U.S. 63 and Route H Public Meeting

U.S. 63 & H Interchange Public Meeting (March 22, 2011)


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