The Marin-Sonoma Narrows B-7 construction project continues in @maringov as the Atherton Avenue on- and off-ramps and the De Long Avenue on-ramp on Southbound US-101 are closed from Tuesday, Aug. 20 to Friday, Aug. 23 from 10 p.m. until 6 a.m. each day. https://t.co/r8XX2IzyOq