PROBLEM TO BE SOLVED: To provide a self-propelled type device, a control method for the self-propelled type device, and a control program for the self-propelled type device such that a work interval between mutually adjacent places is made shorter while work quality on a travel surface is improved.SOLUTION: A self-propelled type device (100) which performs work on a travel surface starts traveling in a second travel route (for example, L2) or a third travel course (for example, L3) among four parallel travel courses which are virtually set and adjacent to one another. The self-propelled type device travels sequentially in the four travel routes (travel routes L1-L4) in order without moving from a travel route in traveling to an adjacent travel route. The self-propelled type device travels in following four travel routes (travel routes L5-L8) in similar order after completing the traveling in the four travel routes L1-L4.【課題】走行面に対する作業品質を改善しつつ、互いに隣接する場所の作業間隔を、より短くすることが可能な自走式装置、当該自走式装置の制御方法、および、当該自走式装置の制御プログラムを提供する。【解決手段】走行面に対して作業を行なう自走式装置１００は、仮想的に設定された互いに隣接する平行な４本の走行経路のうちの２本目（たとえば、走行経路Ｌ２）または３本目（たとえば、走行経路Ｌ３）から走行を開始する。自走式装置は、走行中の走行経路から隣接する走行経路に移動しないように４本の走行経路（走行経路Ｌ１～Ｌ４）を順に走行する。自走式装置１００は、走行経路Ｌ１～Ｌ４の４本の走行経路の走行が完了すると、次の４本の走行経路（走行経路Ｌ５～Ｌ８）を同様の順序で走行する。【選択図】図４
