An automatic railless ground conveyor installation incorporating a passive guide track determining the route network and individual driverless or unmanned traveling conveyor cars, each of which possesses a steering mechanism which scans in a contactless manner the guide track and a work control mechanism. The work control mechanism, by means of a code reader, scans in a contactless manner individual code markings arranged at junctions or branches and directly influences the steering mechanism in the sense of reaching a target or destination determined by a target code set at the work control mechanism. In front of each branch or junction a partial section of the guide track or a corresponding interruption thereof serves as continuous branch code track, the length of which indicates the code of the branch. The work control mechanism possesses a length measuring device which measures the length of the branch code track as well as a comparator which is operatively coupled with the steering mechanism and compares the measured branch code track length with a target code of a target code mechanism and which target code has been introduced as a length.
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