Medium Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 9
Distraction; Situational Awareness
ATC Issue All Types; Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance; Flight Crew Rejected Takeoff; Flight Crew Took Evasive Action
Human Factors; Procedure
I was working the Local Control position during a west operation. Traffic was very light with only a few departures for Runway 28 and a couple of arrivals for Runway 33L. Ground Control asked to cross Runway 28 at R1 with Aircraft Y behind my aircraft that was on departure roll. I approved Ground Control's request to cross. After my scan to make sure I had the required spacing for my next departure; I issued Aircraft X a departure clearance off of Runway 28. Right after the Aircraft X flight began takeoff roll; Ground Control alerted me of Aircraft Y flight crossing down the field. I immediately canceled Aircraft X takeoff clearance; and advised the aircraft to stop the roll due to traffic crossing midfield. Aircraft X stopped short of Taxiway Delta on Runway 28. The aircraft was then taxied clear of the runway and into a hold area to reconfigure. I did not use a memory aid for the crossing which would have aided in preventing this incident.My recommendation for myself would be to utilize the memory aids regardless of the traffic complexity. This is not a facility issue. Management recently stressed the importance of memory aids in our local read and initial binder.
Baltimore Local Controller reported approving an aircraft to cross a runway after the departing aircraft. Local then cleared an additional aircraft for takeoff before the aircraft had finished crossing downfield.