As part of the Interstate 581 and Elm Avenue interchange project in Roanoke, nighttime slow roll lane closures will take place on north and southbound I-581 next week. On Wednesday there will be a shoulder closure on I-581/220 northbound from 8 p.m. to 6 a.m. for bridge work. Intermittent 15-minute long slow rolls will also be used on I-581/220 northbound between 12 a.m. and 4 a.m. Thursday morning. On Thursday there will be a shoulder closure on I-581/220 southbound from 8 p.m. to 6 a.m. for bridge work. Intermittent 15-minute long slow rolls will also be used on I-581/220 southbound between 12 a.m. and 4 a.m. Friday morning. During a slow roll, law enforcement will slow and possibly stop traffic as the equipment is being moved. Each slow roll is anticipated to last approximately 15 minutes.