In order to expand capabilities of anisotropic ratchet conveyor (ARC) systems beyond those of the simple systems that include only a single track of consistent rung spacing, disclosed herein are ARC devices, systems, and methods related to ARC gates that can selectively pause droplet transport; ARC switches that can select the direction of droplet transport between two tracks, each moving away from an intersection between the two tracks; and ARC junctions that can move a droplet towards, and then through, an intersection between two tracks.