Smooth traffic flow is seen on U.S. Highway 95 South, right, as other motorists, left, use the Martin Luther King Boulevard exit during an initial round of ramp and lane closures around the Spaghe …

Smooth traffic flow is seen on U.S. Highway 95 South, right, as other motorists, left, use the Martin Luther King Boulevard exit during an initial round of ramp and lane closures around the Spaghetti Bowl interchange on Monday, March 5, 2018, in Las Vegas. (Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye)