a really strong cold front closures to tell you about on Interstate 81 in Roanoke County and 581 near Valley View. There will be alternating lane closures on 81 north at exit 137 for bridge work. Crews will be fixing the road and shoulder on the bridge over Wildwood Road. The lanes will be closed from 8 tonight until noon tomorrow, and then 4 p-m Saturday until 8 a-m Sunday morning. Interstate 581 will also be down to two lanes overnight for much of next week at the Valley View Interchange project. One northbound lane will be closed Monday, Tuesday and Friday. And a southbound lane will be closed on Wednesday and Thursday.