An NV Energy project will limit traffic on Rock Boulevard for a few days. The project will replace overhead power lines, and there will be shutdowns to keep drivers away from the power line work. Rock Boulevard northbound will be closed from Mill to Greg Streets thru the 18th and again March 21st thru the 23rd, from 7AM to 5PM. No northbound traffic will be allowed on that stretch, so northbound drivers will need to find another route. Some traffic delays will be in place on roads other than Rock, but no other complete directional closures are expected.