Minnesota Blue Card Practice Test

What type of turn does a diverging diamond interchange eliminate?

1. Right hand turns across opposing traffic

2. Left hand turns across opposing traffic

3. Straight turns across opposing traffic

4. None of the above

The correct answer is: Left hand turns across opposing traffic

A diverging diamond interchange is specifically designed to manage traffic flow in an efficient manner by altering the typical layout of intersections. This design features vehicles crossing over to the opposite side of the road, which facilitates safer and more efficient left turns. When vehicles approach a diverging diamond interchange, they are directed to the left side of the roadway, allowing them to make left turns without crossing opposing traffic. This design effectively eliminates the complexities and safety risks associated with left turns across opposing traffic, thereby reducing the likelihood of collisions. By separating the flow of traffic and simplifying the left turn maneuver, diverging diamond interchanges improve overall traffic efficiency and safety. The other answer choices involve different types of turns that are not directly addressed by the structure of a diverging diamond interchange. Right-hand turns across opposing traffic, for instance, are still facilitated since vehicles can turn right without needing to cross opposing lanes. Similarly, straight turns are unaffected by the layout of the interchange. Hence, the elimination of left-hand turns across opposing traffic is the key feature that distinguishes diverging diamond interchanges from traditional designs.