Commercial Fixed Wing
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (mon) .8
Workload; Situational Awareness; Distraction
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway; Ground Incursion Runway
General None Reported / Taken
Staffing; Procedure; Human Factors; Environment - Non Weather Related
Aircraft X was on landing roll for Runway XXR. I called LC2 (training) to give permission to cross after Aircraft X lands. LC2 had crossed Aircraft Y at taxiway [letter] prior to me calling. Inquiring after LC2 had meant to cross another aircraft for his runway. He called to the wrong aircraft. LC2 Controllers have been training all day and have not had good breaks. I was working all day heavy traffic as well with minimal breaks. We were pushing 100-150 movement hours. Staffing included 2 CPC's; 1 OS and 1 trainee for the morning; a second OS came at XA:00.   We all pushed hours and took minimal or no breaks due to staffing and traffic would not stop.  I told Aircraft X to turn left at Runway Y when I meant [taxiway name and number]; but my mind felt like mush.  I believe the trainee made an error due to fatigue as I was also very fatigued from numerous complex requests today. Training has been pushed on the trainee to 'help the facility.' I believe this has put undue stress on the trainee to save the facility since we only have X working CPC's on schedule currently. The pressure to work long hours maximize time on position and 6 days a week for months on end has taken its toll on us.I recommend adequate staffing for the facility.  I understand we need to push training but pressure should not be on a trainee to 'save the facility;' when this is an agency issue. I recommend management push for good breaks for proper cool downs so we can take on traffic with more of a sound and ready mind. Some controllers take on everything without regard for their selves due to trying to perform for the agency. This is a big safety issue.
Ground Controller reported a runway incursion due to communication issues with Local Control. Reporter stated staffing issues contributed to the event.