use openstreetmap for track road changes

For a few yoars I now work in road management of a 2000000 people, no matter its name.We have 900 roads in management, and yearly about 300-400 modification are made in town area.All the projects are in DWG format.I need to track changes and to have 'at once' a detailed view of city roads.If someone bring me a project , with DWG data in relative coordinates can i import it in my proper database?