Diverging Diamond Interchange Archives

Feb 20

Upcoming McAshan Drive DDI bridge girder installation requires rolling roadblocks

Work to build Jefferson County’s first Diverging Diamond Interchange, or DDI, is reaching a significant milestone.

Next week, ALDOT will install girders for the new eastbound bridge over I-59/20 at McAshan Dive in McCalla, weather permitting.

To set the girders on the southbound side, crews will use rolling roadblocks on I-59/20 between I-459 and Exit…

Sep 24

Construction is underway on Jefferson County’s first Diverging Diamond Interchange (DDI) in McCalla.

The $22M project will transform Exit 104 on I-59/20 at McAshan Drive.

The exit offers access to the Rock Mountain Lakes community along with the Jefferson Metropolitan Park.

Diverging Diamond Interchange construction underway at Exit 104 on I-59/20.

It is home to…