A portion of Desert Inn Road will close to traffic overnight this week. Clark County officials say work is being done to expand the arterial’s tunnel underneath the Vegas Strip. Desert Inn between Valley View Drive and Paradise Road will close from 9 p.m. until 5 p.m. on Tuesday and Wednesday nights, while workers install 32 concrete girders. The work is part of a three-point-five million dollar project that will also realign Stardust Road, which connects the Strip and Industrial Road. The project is scheduled to wrap up this summer.