Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 25
Situational Awareness
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Flight Crew Executed Go Around / Missed Approach; Flight Crew Rejected Takeoff
Human Factors; Procedure
Aircraft X was cleared for takeoff; traffic 5 mile final Aircraft Y. Supervisor observes target runway 10 near taxiway G on ASDE-X and I instructed Aircraft X to cancel takeoff clearance and LUAW (Line Up and Wait); due to target. Aircraft X reads back cancel takeoff and LUAW and sees a truck on the runway. Aircraft Y checks in on initial contact 3 mile final. I cancelled Aircraft Y landing clearance and instructed to climb to 2;000 feet and heading of 200. I coordinated with PCT TRACON North Final controller. I observe Aircraft Y is not turning or climbing on the radar and I re-issued climb to 2;000 feet and Aircraft Y delayed read back and questioned to say again. I repeated my instruction and that traffic is on the runway. I observed Aircraft Y in the turn and climb.I should say 'Cancel approach clearance' or 'Go around' and 'Traffic on the runway'. I did not confirm a read back from Aircraft Y.
BWI Tower Controller has an aircraft cleared for takeoff; with another aircraft on 5 mile final. Front Line Manager observes a vehicle on the runway and advises controller. Controller cancels take off clearance and sends traffic on final around.