BOTETOURT CO., Va. -

Workers will close Interstate 81 North to work on the bridge over the Blue Ridge Turnpike.

It will force all northbound traffic off the interstate at Brughs Mill.

You'll take Route 11 for about six miles until you can get back on.

That detour starts at 10:00p.m.

Workers will reopen I-81 around 6:00a.m. Saturday.