germany-montabaur: architectural, engineering and planning services./ replacement construction of overpass structures in the rüsselsheim triangle, project planning of engineering structures and traffic facilities - service phase 8, services sigeko./ replacement construction of overpass structures in the rüsselsheim triangle (a67 üf branch a60 near rüsselsheim - crossing structure, a67 üf branch a60 near rüsselsheim - south building, a67 üf branch a60 near rüsselsheim - north building, incl. seepage basin with pump house) project planning engineering structures and traffic facilities - service phase 8, services sigeko