germany-bremen: market research services./ carrying out quality tests in vehicles and at stops in the zvbn area./ the verkehrsverbund bremen/niedersachsen gmbh (vbn) intends to award survey trips to carry out quality tests in vehicles and at stops of road-bound public transport throughout the area of the zweckverband verkehrsverbund bremen/niedersachsen (zvbn). the order includes the provision of evaluation software by the contractor. in addition to this basic service, an option to extend the basic service is advertised.