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The intersection of Spalding Drive with Chamblee-Dunwoody Road, Spender Trace, and Spalding Club Court has some significant challenges. Citizens of both the City of Dunwoody and the City of Sandy Springs have expressed concerns about the safety of the southbound left turn from Spalding Drive onto Chamblee-Dunwoody Road.
This intersection is currently a five-leg signalized intersection. Spalding Drive is the main street and the two neighborhood streets are split phased from one another. Chamblee-Dunwoody Road operates as an exclusive phase. This intersection has no turn lanes or pedestrian facilities.
The intersection operates in a less than optimal fashion. The split phase operation on the neighborhood streets introduces delay which is particularly realized when there are detection failures. The southbound left turn from Spalding Drive to Chamblee-Dunwoody Rd has no left turn lane and tight visibility. Modifications are worth considering for the benefit of both the Cities of Dunwoody and Sandy Springs.
Several alternatives have been evaluated to improve the safety of the intersection. As outlined in the study linked above, diverting the traffic to another intersection and closing Chamblee-Dunwoody Road (as shown in the drawing) should provide the most benefit for the cost. Providing a southbound left turn signal phase (Alternative C in the operational analysis) is the next most cost effective option, but does not fully resolve the southbound left turn concerns.