US Patent 11414834 Travel route guidance device

When deriving a preparation-unrequired route which enables a construction machine to travel only within a permissible range of a gradient until reaching a destination, a controller causes an output part to output information about the preparation-unrequired route. When not deriving the preparation-unrequired route, the controller determines a location which needs preparation for a specific landform to enable the construction machine to travel only within the permissible range of the gradient until reaching the destination, and causes the output part to output information about the location which needs the preparation and about the traveling route.