On Wednesday, Oct. 25 and Thursday, Oct. 26 from 9 a.m. to 3 p.m. there will be single lane closures on S.W. 257th Drive in Troutdale. Expect traffic delays. Crews will be conducting survey work as part of the S.W. 257th Drive Safety Improvements Project. Flaggers will be on site to help with traffic control for motorized vehicles, cyclists and pedestrians. Multnomah County maintains 269 miles of roads, including S.W. 257th Drive in Troutdale. For information, visit: https://www.multco.us/roads.