Motorists in Cape Girardeau may encounter delays today and tomorrow. Police say crews will be working on traffic signals throughout the city. While crews are working on the signal boxes, traffic lights will be switched over to flashing. Police say this could cause traffic back-ups. Motorists who experience any issues with signals that do not appear to be maintenance related or signal problems that last more than fifteen minutes are asked to call the Cape Girardeau Police Communications Unit at 573-335-6621, or to notify the Cape Girardeau Public Works Department. Crews are schedule to finish the signal work sometime on Thursday.