Transfer system and control method thereof

A transfer system comprising:

• a first travel rail including a first merging section;
• a second travel rail merging the first travel rail at a merging point and including a second merging section overlapping with the first merging section;
• a transfer/loading area defined in the second merging section and located upstream of the merging point;
• and
• a controller configured to control an operation of at least one transfer vehicle moving along the first travel rail and the second travel rail,
• wherein the transfer system is configured to accommodate a second transfer vehicle moving along the second travel rail and entering the transfer/loading area,
• the transfer system is configured to subsequently accommodate, the second transfer vehicle starting a transfer/loading operation in the transfer/loading area,
• the transfer system is configured to subsequently accommodate a first transfer vehicle moving along the first travel rail and entering the first merging section, and
• the transfer system is configured to subsequently accommodate the first transfer vehicle passing through the merging point before the second transfer vehicle.