Four railroad bridges in New Milford will be rehabilitated soon.  The state Department of Transportation and Housatonic Railroad have awarded the work to Northern Construction Service.  The first project will be on River Road.  The street will be closed from the end of the pavement, through to Rooster Tail Hollow starting on Friday.  Traffic will be detoured onto Rooster Tail Hollow starting at 7 am, until Monday August 12th at 5pm.  The contractor has said that work may be done sooner.  Drivers are asked to avoid the area if possible to prevent any delays.