You could file a 311 request asking for a Traffic Safety Investigation at that intersection. In addition, it is probably worth reaching out to your ANC as a starting point. From looking at a map, it looks like this intersection falls in either 4C03 or 4C05 depending on which corner you're on. Contact info for those ANCs is here. They will know best what the history of DDOT's process in evaluating that intersection for traffic calming has been.