A portion of Route 66 will be under construction in Flagstaff starting Friday at around 8 p.m. Construction will take place along the Rio de Flag. The goal of the project is to relocate existing reclaimed water and sewer lines and the storm sewer in conflict with the planned ADOT bridge replacement. Traffic will be reduced to one lane in each direction for north and westbound traffic from Butler Avenue to Leroux Street to provide a safe work zone. Work will take place during the day and/or night until 5 a.m. March 23rd. Commuters are advised to seek an alternate route during this time to avoid delays.