Den controller described potential conflict event when traffic on take off role was asked to cancel ...

Narrative:

I was working the local control 2 position at den tower. I cleared air carrier Y for takeoff on runway 17R. About 3/4 through his take off roll; I heard the ground controller key up and instruct aircraft X (cargo) aircraft to stop! I looked at the runway and then to the ground radar and aircraft X data tag was on runway 17R at the departure end. The asde-X/amass alerted to a potential collision and I canceled the takeoff clearance for air carrier Y. Air carrier Y was close to V1 and seconds later rotated; then became airborne and stated that they were committed to take off at the point of cancellation. Perhaps better runway markings at the departure end of runway 17R. This is a high use area and many small and large cargo aircraft utilize these taxiways during early morning and night time operations. I know the red stop bars are only used during smgcs operations (low visibility); but having these red bars on during normal operations at areas where aircraft do not 'normally' enter the runway may have kept the aircraft from entering.

Original NASA ASRS Text

Title: DEN Controller described potential conflict event when traffic on take off role was asked to cancel take off clearance but could not comply; creating a conflict with traffic making an unauthorized entry onto the same runway.

Narrative: I was working the Local Control 2 position at DEN Tower. I cleared Air Carrier Y for takeoff on Runway 17R. About 3/4 through his take off roll; I heard the Ground Controller key up and instruct Aircraft X (cargo) aircraft to stop! I looked at the runway and then to the Ground RADAR and Aircraft X Data Tag was on Runway 17R at the departure end. The ASDE-X/AMASS alerted to a potential collision and I canceled the takeoff clearance for Air Carrier Y. Air Carrier Y was close to V1 and seconds later rotated; then became airborne and stated that they were committed to take off at the point of cancellation. Perhaps better runway markings at the departure end of Runway 17R. This is a high use area and many small and large cargo aircraft utilize these taxiways during early morning and night time operations. I know the RED stop bars are only used during SMGCS operations (low visibility); but having these red bars on during normal operations at areas where aircraft do not 'Normally' enter the runway may have kept the aircraft from entering.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	933595
Time
Date	201102
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Airport
State Reference	CO
Aircraft 1
Make Model Name	Small Transport Low Wing 2 Turboprop Eng
Operating Under FAR Part	Part 135
Flight Phase	Taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	A319
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Local
Events
Anomaly	Conflict Ground Conflict Critical Deviation - Procedural Clearance Ground Incursion Runway

Den controller described potential conflict event when traffic on take off role was asked to cancel take off clearance but could not comply; creating a conflict with traffic making an unauthorized entry onto the same runway.