Kate Clements, program and external affairs assistant at the Perimeter Community Improvement Districts, left, uses a video display to demonstrate the planned operation of the new Ashford-Dunwoody “diverging diamond” interchange to Tricia Bethel-Sookhoo of W Atlanta Perimeter hotel during the Dunwoody Business Expo on April 21. The expo at the Crowne Plaza attracted displays from about 50 businesses and groups that work in the area, organizers said. The “diverging diamond” interchange will be the first of it kind in Georgia. It is scheduled to be completed next year. Once the new design is in place, cars will cross the bridge on the left, rather than the right, lanes in order to reduce the wait for turning onto I-285.