Narrative:

I was on position as a stand-alone controller in charge during the event. Training was being accomplished on ground control. Vehicle X was holding short of runway xx on west. Ground control issued instructions to the vehicle to cross runway xx without coordinating with local control. Local control had just cleared aircraft X to takeoff on runway xx. Knowing this; I shouted 'no; no; no!' which can be heard on the tapes; towards the ground control trainee. The trainee then stopped in the middle of the transmission. Vehicle X began to cross the runway; and then read back the crossing instructions. Aircraft X was on takeoff roll and slightly airborne when vehicle X crossed in front of it. Vehicle X was clear of the intersection of runway xx and west before the aircraft reached it.at the time; there was a coyote running around the field; including on active runways. Myself and the ground control trainee were trying to keep an eye on the coyote in order to relay its position to vehicle X; which is the reason the vehicle came out in the first place. I believe this may have been a contributing distraction to the event.as the controller in charge; I think that instead of shouting 'no; no; no!' I should have shouted 'hold short' instead. Perhaps that may have cued the trainee to say those words instead of just stopping the transmission altogether. Memory aids were used properly at the time; I think this is just a freaky mistake that is a one-time thing. I don't know that anything else could have been done on my part to prevent this incident. The trainee could possibly learn to scan better (looking at the board to see that ground control did not have runway xx for crossing) and the ojti [on-the-job training instructor] perhaps could have keyed up over the trainee and told the vehicle to hold short.

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Original NASA ASRS Text

Title: Two Local Controllers reported a runway incursion between a departing aircraft and a crossing vehicle.

Narrative: I was on position as a stand-alone CIC during the event. Training was being accomplished on Ground Control. Vehicle X was holding short of Runway XX on W. Ground Control issued instructions to the vehicle to cross Runway XX without coordinating with Local Control. Local Control had just cleared Aircraft X to takeoff on Runway XX. Knowing this; I shouted 'No; no; no!' which can be heard on the tapes; towards the Ground Control Trainee. The Trainee then stopped in the middle of the transmission. Vehicle X began to cross the runway; and then read back the crossing instructions. Aircraft X was on takeoff roll and slightly airborne when Vehicle X crossed in front of it. Vehicle X was clear of the intersection of Runway XX and W before the aircraft reached it.At the time; there was a coyote running around the field; including on active runways. Myself and the Ground Control Trainee were trying to keep an eye on the coyote in order to relay its position to Vehicle X; which is the reason the vehicle came out in the first place. I believe this may have been a contributing distraction to the event.As the CIC; I think that instead of shouting 'No; no; no!' I should have shouted 'Hold short' instead. Perhaps that may have cued the Trainee to say those words instead of just stopping the transmission altogether. Memory aids were used properly at the time; I think this is just a freaky mistake that is a one-time thing. I don't know that anything else could have been done on my part to prevent this incident. The Trainee could possibly learn to scan better (looking at the board to see that Ground Control did not have Runway XX for crossing) and the OJTI [On-the-Job Training Instructor] perhaps could have keyed up over the Trainee and told the vehicle to hold short.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.