Thursday, August 13, 2009

Diverging Diamond...

On my way to the Ozark Empire Fair, I had the exciting opportunity to drive through Springfields NEW Diverging Diamond Interchange!!

From Wiki:

A diverging diamond interchange is a rare form of diamond interchange in which the two directions of traffic on the non - freeway road cross to the opposite side on both sides of the bridge at the freeway. It is unusual in that it requires traffic on the freeway overpass (or underpass) to briefly drive on the opposite side of the road from what they are accustomed.

The diverging diamond interchange allows for two-phase operation at all signalized intersections within the interchange. This is a significant improvement in safety, since no left turns must clear opposing traffic and all movements are discrete, with most controlled by traffic signals. Additionally, the design can improve the efficiency of an interchange, as the lost time for various phases in the cycle can be redistributed as green time; there are only two clearance intervals (the time for traffic signals to change from green to yellow to red) instead of the six or more found in other interchange designs.

The only known diverging diamond interchanges are located in Versailles, Le Perreaux-sur-Marne, and Seclin, France and in Springfield, Missouri.

The Diverging Diamond can be found at the I-44/Kansas Expressway Interchange. It seemed to work pretty well although it did feel strange to be driving on the wrong side of the road....

1 comment:

  1. Just seeing this makes me miss my granddad.

    I love the ozarks... maybe we will brave the trip back this year, after all...