Lane change route instructing device and lane change route instructing system

A lane change route instructing device, comprising at least one processor;

• and
• at least one memory including computer program code, which when executed, causes the at least one processor to:
• communicate with a multiple of vehicles;
• receive a target travel route from each vehicle;
• determine whether or not the target travel routes of each vehicle will coincide with each other in accompaniment to a lane change;
• determine inter-vehicle priority relating to a lane change;
• and
• transmit a travel route command to each vehicle, comprising,
• when it is determined that a coinciding of the target travel routes will occur, transmitting a command to maintain the target travel route to a highest priority coinciding vehicle, which is a vehicle for which the priority is highest among coinciding vehicles whose target travel routes have been determined to be going to coincide with each other, and transmitting a command for evasive travel that avoids a coinciding with the target travel route of the highest priority coinciding vehicle to a low priority coinciding vehicle, which is a vehicle other than the highest priority coinciding vehicle among the coinciding vehicles, wherein based on the travel route of the low priority vehicle including a lane change, the command for evasive travel includes a command to reduce speed and subsequently perform the lane change.