Medium Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 0.2
Situational Awareness; Human-Machine Interface; Distraction; Confusion
ATC Issue All Types; Conflict Ground Conflict; Critical; Ground Event / Encounter Aircraft
Air Traffic Control Provided Assistance
ATC Equipment / Nav Facility / Buildings; Airport
Aircraft X was put into position on the runway and appropriate traffic calls were made. Aircraft Y landed on an intersecting runway and was told to turn right at taxiway and hold short of the runway for the departing traffic. The pilot read back the instructions and complied. Aircraft X was cleared for takeoff. On departure roll the ASDE-X alarmed and displayed a conflict between Aircraft X and Aircraft Y. I observed Aircraft Y holding short of the runway; stationary; as instructed. Aircraft X departed safely. The ASDE-X alarmed in error and should be checked for accuracy to ensure it is operating correctly.
RDG Local Controller reported a false ASDE-X warning. An arrival was holding short of an active runway with a departing aircraft when the warning sounded. The Controller visually confirmed the arrival was holding short and the takeoff was uneventful.