 With forecast winds light and variable, Grand Forks Mosquito Control will conduct a high traffic spray starting at 8 p.m. tonight in Grand Forks. The trap count Monday morning was 18. North Dakota's Department of Transportation has completed a traffic study that shows roundabouts reduce serious injuries and save lives. Justin Schlosser, traffic operations engineer for the DOT, said the study looked at 12 of the state's 14 roundabouts.