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Location: I-70 and Stadium Boulevard (Route 740) in Columbia

What is a Diverging Diamond Interchange? Why is it Safer?
This innovative traffic solution is located at I-70 and Stadium Boulevard (Route 740) in the Central District and handles high traffic volumes effeciently, resulting in less congestion and overall improved safety. The configuration accomplishes this by allowing free-flowing left turns for motorists. These free-flowing left turns keep traffic moving and keep vehicles from crossing opposing traffic, thereby reducing the chances of a collision.

What does it look like?

For a detailed look at the diverging diamond interchange, click the map or the information video below.

I-70/Stadium Blvd. Diverging Diamond Interchange Map

DDI Columbia 600

How Does it Work?

Motorists on Stadium entering the interchange are directed to the opposite side of the roadway after traveling through a set of traffic lights. Those who want to get on the interstate turn left onto the ramp without stopping for more lights or crossing opposing traffic, while drivers going straight proceed through a second set of traffic lights redirecting them to the right side of the road after leaving the interchange.

Click on the information video below for a tour of a diverging diamond interchange:


Traffic Flowing Smoothly on Central Missouri's First Diverging Diamond Interchange

Traffic is flowing smoothly on Central Missouri’s first diverging diamond interchange, which opened to traffic Oct. 13, 2013 at Route 740 (Stadium Boulevard) and Interstate 70 in Columbia.


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